Productivity

postiz-app32.3k★

Postiz does that as an open source app you can self-host. It supports Twitter/X, LinkedIn, Instagram, Facebook, TikTok, and more. The AI features generate post variations and suggest optimal posting times. You get a content calendar, team collaboration, and analytics. Self-hosting is free under AGPL-3.0. The cloud version at postiz.com has a free tier and paid plans; details vary but expect typical SaaS pricing for social scheduling ($15-30/mo range for individuals, more for teams). The catch: AGPL means if you modify the code and offer it as a service, you must open source your changes. The growth is impressive but the project is young, expect rough edges and breaking changes. Self-hosting requires Docker, PostgreSQL, Redis, and an LLM API key for the AI features (OpenAI, etc.) which adds cost. And honestly, if you're one person managing one account, Buffer's free tier is less work to set up.

Flow.Launcher15.0k★

Flow Launcher is a keyboard-driven search bar for Windows. Hit a hotkey, type, and instantly open apps, find files, run web searches, or do quick calculations without ever touching the mouse. It's MIT licensed and completely free, with a plugin store for extending it. Under the hood it taps the Everything search engine and the Windows index for fast file search, and the plugin API (Python, C#, JavaScript, F#) lets the community add things like Spotify control, Steam game launching, and window switching. Install is trivial through the installer, Winget, Scoop, or Chocolatey. No server, no config. Anyone who used Alfred or Raycast on a Mac and missed that speed on Windows will feel right at home. It's the spiritual Windows equivalent, though not a literal swap, since those tools are macOS-only. Anyone on Windows who lives on the keyboard should install it. No team-size calculus here, it's free for everyone. Two catches. It's Windows-only, so there's nothing here for Mac or Linux users. And because plugins are community-made, quality and maintenance vary, so a plugin you rely on might go stale.

notesnook14.2k★

Notesnook is the note-taking app for people who actually care about privacy. End-to-end encrypted with XChaCha20-Poly1305 and Argon2, everything is encrypted on-device before it touches any server. Web app, desktop (Electron), and mobile (React Native) all ship for free. The encryption isn't bolted on as an afterthought. It's the foundation. Notes, notebooks, tags, attachments, everything gets encrypted client-side. The sync infrastructure handles encrypted blobs only. This makes it a credible Evernote replacement for anyone who's uncomfortable with their notes sitting in plaintext on someone else's server. Solo users and small teams who value privacy over collaboration features will love this. The editor is solid, markdown support works well, and the apps are polished. Real-time collaboration and deep integrations with other tools are where Notion or Evernote still win. For personal note-taking with actual security, Notesnook is the best option in this space. The catch: the open source version is the full product, but self-hosting the sync server isn't officially documented. You're trusting their sync infrastructure or going without sync entirely.

llm_wiki12.6k★

LLM Wiki turns your documents into a structured, interlinked knowledge base using any LLM you want. Drop in PDFs, Word files, or web clips and the app runs a two-step chain-of-thought process: analyze the content, then generate wiki pages with source traceability and automatic cross-references. The knowledge graph visualization surfaces connections you didn't know existed. Built with Tauri and React, it runs as a native desktop app on macOS, Windows, and Linux. Pre-built binaries mean no build step. It works with OpenAI, Anthropic, Google, Ollama (for zero API cost), or any OpenAI-compatible endpoint. Optional vector search via embedded LanceDB adds semantic lookup. The wiki directory is Obsidian-compatible, so you can open it directly in Obsidian for manual editing. Solo researchers and writers get an AI-powered second brain that keeps all data local. Small teams sharing a knowledge base get automatic entity extraction and gap detection. The Louvain community detection algorithm finds knowledge clusters automatically. The catch: every document you ingest costs LLM tokens. Large libraries add up fast, especially with the two-step analysis. The Deep Research feature requires a paid Tavily API key. And the quality of generated pages depends entirely on which LLM you're using.

grist-core11.2k★

Grist is a spreadsheet-database hybrid. Rows are records, columns are typed fields, and formulas are Python. You get the layout flexibility of a spreadsheet with the structure of a relational database, without the proprietary lock-in of Airtable. Apache-licensed, free to self-host. Docker single-container deployment. It runs comfortably on a small VPS. The Python formula language is genuinely powerful. Access rules let you share specific views of data with external users or clients without exposing everything. Teams that outgrew Excel but find Airtable too restrictive or too expensive for their use case should evaluate Grist. The Python formula support is the differentiator: real computation, not just cell references. The catch: the UI is less polished than Airtable and the mobile experience is limited. It looks and feels like productivity software from 2018. The underlying data model is excellent; the surface needs work.

obsidian-copilot7.3k★

Obsidian Copilot puts an AI assistant inside Obsidian without sending your notes to a service. The plugin is AGPL-3.0 frontend. You bring your own API key for OpenAI, Anthropic, Gemini, Cohere, OpenRouter, or any OpenAI-compatible endpoint, including local models through Ollama or LM Studio. Your vault stays on your machine. Install through Obsidian's community plugin browser, paste your API key, and you have chat over your notes, vault-wide semantic search with embeddings, command palette workflows, and image understanding for screenshots in your notes. Setup is a five-minute job. Solo writers and researchers: free tier is genuinely useful with a personal API key. Plus tier ($0.99/month as of mid-2026, may vary) adds autonomous agents, time-window queries (find notes I wrote about X last month), PDF and video summarization, and web search. Teams: each user pays their own LLM costs, and Plus covers the heavier features. The catch is the AGPL label is misleading. The plugin frontend is open, but Plus features run against a proprietary backend the developer controls. That is fine as a business model, but do not pick this expecting a fully self-hostable AI stack. If you need that, look at Khoj or pair raw Obsidian with a local Ollama setup.

baserow5.1k★

Baserow is a no-code database builder you can self-host. It looks like Airtable: tables, views, forms, linked records, and a clean grid interface. All the common field types. Django-powered backend, MIT-licensed. Docker Compose deployment is straightforward. The application server, Celery workers, and Postgres database all spin up together. Reasonably lightweight. The API is REST-based and documented. Premium features (more views, more storage, SAML) are on paid tiers but the free self-hosted version covers most teams. Teams replacing Airtable or looking for a self-hosted no-code database platform get a clean, functional tool here. Non-technical users can use it without training. The Airtable similarity is intentional and works well for onboarding teams. The catch: it does not have Airtable's automation builder or third-party integration depth. It is primarily a database with views, not a workflow automation tool. Import from Airtable exists but expect cleanup work.

Radicale4.8k★

Radicale is a calendar and contacts server you run yourself. When you want your events and address book off Google or Apple but still synced across your phone, laptop, and desktop, this is the piece that does it. It speaks CalDAV and CardDAV, the standard protocols every major calendar and contacts client already supports, and it stores everything as plain files on disk. No database, no heavy stack. It is famously easy to stand up: a Python install and a small config, and you have a working server. Production hardening is where it climbs to moderate, since you will want TLS, real authentication, and a reverse proxy in front of it. But there is no database to babysit and the data is just files you can back up with anything. Radicale is GPLv3 and completely free, with no paid tier or hosted option. The trade is that you become the host. Baikal is a similar single-purpose option, and when you want calendar and contacts as part of a bigger self-hosted suite with a web UI, Nextcloud or SOGo cover more ground. Solo users and families are the sweet spot. Small teams can run it happily; larger orgs usually want the broader suite instead. The catch is scope. Radicale does calendar and contacts and nothing else, and there is no friendly web app for end users to click around in. You manage everything through a client, and uptime and backups land entirely on you.

Vikunja4.6k★

Vikunja is a self-hosted task and project manager that occupies the middle ground between Todoist's simplicity and Asana's structure. Written in Go (single binary, no PHP), with a Vue frontend. AGPLv3 source, version 2.3.0 dropped last month, and almost 14,000 commits on the main branch. The project ships at a steady pace. Self-hosting is straightforward in a way that Mautic and SuiteCRM are not. Pull the Go binary, point it at SQLite or Postgres, run it. No PHP runtime, no Apache config, no extra layers. Multiple views (lists, Kanban, Gantt, calendar), labels, subtasks, recurring tasks, attachments, and webhooks all in the box. Mobile apps and a browser extension round it out. Solo users who want their data on a Raspberry Pi or VPS: install it tomorrow. Small teams frustrated with Todoist or Trello's pricing at multiple seats: self-host and move on. Teams that need vendor support and 24/7 availability: Vikunja Cloud is the team's hosted offering and is reasonably priced. The catch: Vikunja is a task manager, not a documents-plus-projects suite like Notion or ClickUp. If you want one tool for tasks AND wiki AND databases AND chat, this isn't it. Pair it with Outline or AppFlowy if you need documentation alongside.

KillerPDF2.6k★

KillerPDF is a portable PDF editor for Windows with no installer, no account, no telemetry. GPLv3 and maintained by a solo developer. It does the things most people use Adobe Acrobat for: edit text, add signatures, merge and split pages, extract images, fill forms. "Portable" means you download a single .exe and run it. No system integration, no registry keys, no background processes. For teams that need PDF editing on machines without admin rights or on USB sticks moving between locked-down computers, that alone is the reason to install it. Solo users on Windows get a free replacement for the $15/month Adobe Acrobat subscription or the $160 one-time Nitro license. Small teams save per-seat fees. Large teams with document workflows still want something with audit trails and integrations. The catch: Windows only, no Mac or Linux builds. The UI is functional rather than polished, and for anything beyond basic editing (advanced redaction, OCR, accessibility compliance) you still want a paid tool.

loomio2.6k★

Loomio is a collaborative decision-making tool for groups that need to agree on things asynchronously. Threads, polls, proposals with structured outcomes, and consensus signals. AGPL-3.0, with a hosted version at loomio.com if you don't want to run it yourself. Self-hosting uses the loomio-deploy repo with Docker Compose. Setup is real work: Postgres, Redis, mail server, plus the Rails app. Once running, it's stable. The project has been shipping for over a decade and integrates with Slack, Microsoft Teams, and email participation. Pick this for cooperatives, nonprofits, unions, and political groups that use formal decision processes. It is not a Slack replacement. Solo: wrong use case. Small teams that vote on things: free self-hosted or pay for the hosted plan. Large orgs: open source handles thousands of users; commercial support is available. The catch: it is niche. If your team makes decisions in Slack DMs and a quick async poll, you don't need this. Loomio's value shows up when "who has the authority to decide what" matters and you need a record of how the decision was made.

crosspaste-desktop2.2k★

CrossPaste syncs your clipboard across Mac, Windows, and Linux in real time. Copy on one machine, paste on another. Supports text, URLs, HTML, RTF, images, colors, and files. Everything stays on your local network with end-to-end encryption. No cloud server involved. Runs as a desktop app built with Kotlin and Compose Multiplatform. No server to set up. Devices discover each other automatically on the same network. Uses asymmetric encryption for security and SQLite for local storage. Smart cleanup keeps clipboard history from eating your disk. Free for everyone. No paid tier, no accounts, no telemetry. Solo developers working across multiple machines will use this daily. Teams in the same office get effortless sharing without any IT setup. The catch: LAN-only means no syncing between home and office unless you set up a VPN. If you need cloud sync across locations, this is not the tool. Look at paid options or set up Syncthing as a workaround.

fieldtheory-cli1.9k★

Field Theory syncs your X/Twitter bookmarks to local storage and makes them actually searchable. Every bookmark gets pulled down with full metadata, stored in ~/.ft-bookmarks, and indexed for instant search. If you've bookmarked hundreds of tweets and can never find anything, this solves that. The CLI handles the OAuth flow, syncs incrementally, and includes an AI-powered classification system that can organize bookmarks by topic. It generates a local knowledge base from your saved content. Mac-only for now, runs as a simple npm package. Power users who treat Twitter bookmarks as a research archive get the most value. If you bookmark 5 tweets a week, you don't need this. If you bookmark 50, and half of them are technical references you need to find later, Field Theory is worth the setup. The catch: Mac-only, Twitter API dependent (which means the API can break at any time), and the AI classification needs a Claude API key, which adds cost.

cafe-hass1.6k★

cafe-hass is a drag-and-drop editor for Home Assistant automations. Instead of hand-writing YAML, you build your logic as a flowchart and it transpiles down to native Home Assistant automations. If you have ever stared at indentation errors trying to get a motion sensor to do the right thing, this is the visual layer that fixes that. MIT, free, installs through HACS. Because it outputs standard Home Assistant YAML, there is no separate engine running, the automations are native once generated, which means you are not adding another always-on service to babysit the way you would with Node-RED. It lives entirely inside your self-hosted Home Assistant. Setup is trivial if you already run HACS. This is for Home Assistant users who want visual automation building without standing up Node-RED alongside it. Solo home setups, which is basically everyone here, it is free, full stop. The flip side: it only matters if you run Home Assistant, and because it compiles to YAML, deeply custom logic can still bump into Home Assistant's native automation limits. The catch is the niche. cafe-hass solves a real annoyance, and it solves it for exactly one audience: people already running Home Assistant. Outside that world it has no reason to exist. Inside it, it is one of the nicer ways to stop fighting YAML.

wechatpay1.5k★

wechatpay turns your exported WeChat payment history into something you can actually read. WeChat's own bill export is a raw file; this desktop app imports it and builds charts: spending by category, by merchant, by month, plus search and filtering across every transaction. Built on Electron, MIT licensed, and free. Everything runs locally, so your financial data never leaves your computer. There is nothing to operate. Download the app, import your bill file, and it processes everything offline. No account, no server, no upload. You can export the analysis back out to Excel with multiple worksheets if you want to take it further. For a personal-finance tool handling sensitive data, the local-only design is the right call. This is a personal tool with a specific audience: WeChat users in China who want to understand where their money goes. It is free, it is private, and it does one job. There is no team angle and no paywall. If you use WeChat Pay heavily and have never looked at the patterns, it is worth an afternoon. The catch is the narrow scope. It reads WeChat bills and nothing else, so it will not consolidate accounts across banks or other wallets. It is a single-source analyzer, useful precisely because it does not try to be a full finance app.

minutes1.3k★

Minutes is a local-first meeting and voice-memo memory layer. Record conversations, transcribe with whisper.cpp, identify speakers with pyannote, save everything as markdown with YAML frontmatter to `~/meetings/`. Any AI you use (Claude Code, Codex, Gemini CLI) reads your transcripts directly. MIT licensed, Rust. Install via Homebrew on macOS or Cargo anywhere. Pick a Whisper model (75MB to 3.1GB by accuracy). Optional Parakeet or Apple Speech backends if Whisper falls short. Cloud summarization is opt-in. Default is everything stays on your machine. Pick this if you record a lot of conversations and want them grep-able from your terminal. Solo: free, fast, private. Small teams sharing notes: works because the format is plain markdown in a folder. Large teams paying $18/mo per seat for Granola get richer summaries; if you don't care, you save the subscription. The catch: Granola, Otter, and Fathom invest in summary quality and live note-taking UX. Minutes gives you the substrate; you bring the AI prompts. If you want polished summaries delivered automatically, the SaaS tools win. If you want plaintext you own forever, this wins.

MouseInc.Settings1.1k★

MouseInc is a Windows mouse gesture and enhancement tool: draw a gesture with your mouse to trigger actions like closing tabs, switching windows, or scrolling. This repo is specifically the settings UI for MouseInc, built in Vue. The settings panel is in Chinese and the project is primarily used in the Chinese developer community. MouseInc itself is closed source; this open source component only covers the configuration interface, not the gesture engine. The catch: this is the settings panel for MouseInc, not the tool itself. Limited utility outside the Chinese-speaking Windows user community. If you want open source mouse gestures, this isn't a complete solution.

tab-labeler185★

Tab Labeler renames your browser tabs. You give a tab a custom label, optionally with an emoji, and it sticks across reloads so a wall of identical localhost tabs becomes readable again. It is a Manifest V3 extension for Chrome, Edge, and Brave, MIT licensed and free, with no backend, no tracking, and no sync. There is almost nothing to set up if you grab a store build; from source it is an npm install, a build, and loading the unpacked folder. Everything is stored locally in the browser. Quick presets like Done and Important plus a keyboard shortcut keep daily use fast. That is the whole tool, and it does not pretend to be more. If you live in dozens of tabs and lose track of which is which, this scratches a specific itch for free. It is not a session manager and will not group, suspend, or restore tabs, so if you need that, look at OneTab or a full session manager instead. The catch is scope: it labels tabs and nothing else. For some people that is exactly enough, and for others it is one small feature of a bigger tool they already run.