Top PKM GitHub Repositories & Tools (2026)

An AI second brain that maintains itself. Full guide, starter vault, agent skills and scripts for a self-organizing knowledge base in Claude Code and Obsidian.

Synthadoc: An open-source LLM knowledge compilation engine that turns raw documents into structured, local-first wikis. A transparent, human-readable alternative to traditional RAG, which can be self-managed and self-improved without the use of any tools.

Compass: run your whole life out of Obsidian. Daily questions, quarterly retreats, planning, habits, tasks, writing, and an AI assistant in the vault.

A modern Android app for installing and managing APK packages with split APK support, silent install via Shizuku, and VirusTotal malware scanning.

A privacy-first, open-source platform for knowledge management and collaboration. Download link: http://github.com/logseq/logseq/releases. roadmap: https://logseq.io/p/NX4mc_ggEV

Project management inside Obsidian. Table, Gantt and Kanban over plain Markdown notes, with a local API for agents and scripts.

Open-source research workspace for connecting sources, evidence, notes and ideas. Built for academic research with Zotero integration. Available on MacOS, Windows and Linux.