11 open source tools compared. Sorted by stars. Scroll down for our analysis.
| Tool | Stars | Velocity | Score |
|---|---|---|---|
Joplin A free, open source note-taking and to-do application with synchronization capabilities. | 54.7k | +128/wk | 64 |
notesnook A fully open source & end-to-end encrypted note taking alternative to Evernote. | 14.0k | +26/wk | 74 |
grist-core Grist is the evolution of spreadsheets. | 11.0k | +22/wk | 71 |
llm_wiki LLM Wiki is a cross-platform desktop application that turns your documents into an organized, interlinked knowledge base — automatically. Instead of traditional RAG (retrieve-and-answer from scratch every time), the LLM incrementally builds and maintains a persistent wiki from your sources。 | 6.6k | +944/wk | 65 |
baserow Build databases, automations, apps & agents with AI — no code. Open source platform available on cloud and self-hosted. GDPR, HIPAA, SOC 2 compliant. Best Airtable alternative. | 4.8k | +39/wk | 61 |
loomio Loomio is a collaborative decision making tool | 2.5k | - | 61 |
crosspaste-desktop Universal Pasteboard Across Devices | 2.1k | +13/wk | 60 |
fieldtheory-cli Sync and locally store all of your X/Twitter bookmarks. Free and open source CLI for Mac. | 1.7k | +23/wk | 67 |
KillerPDF Portable PDF editor for Windows. GPLv3. No installer, no account, no subscription, no telemetry. | 1.4k | +256/wk | 59 |
minutes Every meeting, every idea, every voice note — searchable by your AI. Open-source, privacy-first conversation memory layer. | 1.2k | +13/wk | 65 |
MouseInc.Settings MouseInc设置界面 | 1.1k | +8/wk | 55 |
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Joplin is the Evernote replacement that actually respects your data. Markdown-native note-taking with notebooks, tags, to-dos, and a web clipper that grabs full pages from Chrome and Firefox. Your notes sync via Nextcloud, Dropbox, OneDrive, or Joplin's own cloud service. End-to-end encryption is built in. Desktop and mobile apps cover every platform: Windows, macOS, Linux, iOS, Android. The desktop experience is solid, with a split editor/preview, rich plugins, and custom themes. Importing from Evernote is a first-class feature, preserving formatted content, attachments, and metadata in one shot. Solo users who left Evernote (or want to) get everything they need for free. Self-hosters running Joplin Server get team sync without paying for cloud. Casual users just point it at Dropbox and never think about infrastructure. The catch: no real-time collaboration. The sync model is file-based, not operational transforms, so conflict resolution is basic. Mobile apps have historically lagged the desktop. And if you need Notion-style databases and kanban boards alongside your notes, Joplin doesn't do that.
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.
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.
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.
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.
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 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.
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.
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.
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 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.