Documentation Open Source Tools

Alternative toSublime Text

Hyperextensible Vim-based editor with Lua plugin support

• 103,088 GitHub stars
• Apache-2.0Licence Apache-2.0
• #Coding

Alternative toAdobe Acrobat

Self-hosted PDF editor with 50+ tools for every PDF task

• 94,607 GitHub stars
• MITLicence MIT

Alternative toLlamaParse

Document parsing for LLM workflows, OCR, and agent reading.

• 82,142 GitHub stars
• CustomLicence Apache-2.0 with commercial threshold and attribution terms
• #LLM

Alternative toNotion

Local-first workspace combining docs, whiteboards, and notes

• 73,684 GitHub stars
• MITLicence MIT

Alternative toGitBook

React-based static site generator for documentation

• 66,537 GitHub stars
• MITLicence MIT

Alternative toConductor

Assign GitHub issues to AI coding agents. They run on your machine.

• 53,308 GitHub stars
• Multica-1.0Licence Multica-1.0

Alternative toNotion

Block-based notes with backlinks and end-to-end encrypted sync

• 46,858 GitHub stars
• AGPL-3.0Licence AGPL-3.0

Alternative toRoam Research

Privacy-first knowledge base with outliner and graph view

• 45,303 GitHub stars
• AGPL-3.0Licence AGPL-3.0

Alternative toNotion

Team wiki and knowledge base with realtime collaboration

• 40,988 GitHub stars

Alternative toSnagit

Screenshot and record with 80+ upload destinations on Windows

• 40,240 GitHub stars
• GPL-3.0Licence GPL-3.0