Open Source Software & Tools
Discover, compare and explore open-source software across AI, developer tools, automation, productivity, databases and more.
Skip the setup — get fully-managed, open-source scheduling with team round-robin, workflows and 100+ integrations. Self-host or let Cal handle it.
What you'll find here
Browse by category, then open any tool's profile to compare and choose what fits your stack — each profile covers:
A personal AI assistant that acts, not just answers.
ChatGPT
Claude
Desktop AI agent with persistent memory across platforms.
ChatGPT
Workflow automation with 400+ integrations and native AI nodes.
Zapier
Open-source AI coding agent for the terminal with 75+ LLM providers.
Claude Code
Self-hosted AI chat interface for any LLM, local or API.
Claude
ChatGPT
Virtual whiteboard for sketching hand-drawn diagrams together.
Miro
Blazing-fast, Rust-built code editor with native AI and collaboration.
Claude Code
Cursor
Autonomous AI dev agents that plan and ship code changes end-to-end.
Claude Code
Devin
Free, open-source video editor that runs in the browser.
CapCut
Open-source AI chat framework with agents and plugins.
ClaudeChatGPT
AI workspace for docs, wikis and projects — fully local-first.
Notion
Local-first workspace merging docs, whiteboards and databases.
NotionMiro
Agentic AI coding assistant for VS Code with multi-file edits.
Claude CodeCursor
All-in-one AI workspace — chat with your documents, any model.
ClaudeChatGPT
Turn any database into a smart spreadsheet with views and APIs.
Airtable
Self-hosted, private note-taking built around a timeline.
Notion
Open-source design and prototyping platform for teams.
Figma
Canva
Encrypted markdown notes with web clipper and sync everywhere.
Evernote
Issue tracking and project planning with cycles and modules.
Linear
Jira
Drag-and-drop builder for LLM apps and AI agents.
n8n
Self-hosted agents that watch the web and act for you.
Zapier
IFTTT
Infinite canvas and whiteboard SDK with a delightful feel.
Miro
Terminal AI pair programmer that edits your codebase with any model.
Claude Code
Scheduling infrastructure — booking links you fully control.
Calendly
Customizable team chat with voice, video and omnichannel.
Slack
Block-based PKM with backlinks and spaced-repetition flashcards.
Notion
Privacy-first outliner for networked notes and daily journaling.
Obsidian
Roam
The open-source internet OS — a personal cloud in your browser.
Google Drive
Fast team knowledge base and wiki with real-time editing.
NotionConfluence
Open-source notification infrastructure for products.
Customer.io
Secure team messaging and collaboration for technical teams.
Slack
Simple, fast, privacy-focused analytics you can host yourself.
Google Analytics
Privacy-first, open-source alternative to Google NotebookLM.
NotebookLM
Open-source AI code assistant for VS Code and JetBrains.
Claude Code
GitHub Copilot
Open-source social media scheduling across every network.
Hootsuite
Buffer
Self-hosted AI coding assistant with a privacy-first design.
Claude CodeGitHub Copilot
AI dev agent that builds full apps from a description.
Lovable
Bolt
Open-source embedding database for AI apps and RAG.
Pinecone
Open-source VS Code fork with built-in AI and full privacy control.
Claude CodeCursorAll 78 open-source tools, A–Z
Every tool in the directory — jump straight to any profile.