Obsidian
FreeA local-first knowledge base — your notes stay yours
No Ads No Tracking Offline No Sign-up Cross-platform
A Markdown-based notes and knowledge tool. Every file lives on your own disk — no account, no cloud lock-in, no subscription wall.
Why we picked it
What makes Obsidian special is that it gives data ownership back to you. Your notes are plain
.md files sitting in a folder — open them in Obsidian today, any editor tomorrow, and they'll
still be readable in ten years no matter what happens to the company.
It's completely free for personal use, with no paywall on core features, no forced sign-up, and no ads. A huge ecosystem of community plugins lets it become whatever you need. If you're looking for a tool to trust a lifetime of notes to, start here.