ReticulOS

ReticulOS is a desktop notes app for Windows and Linux, with Mac coming next. Highlight text in any app and press Ctrl+Shift+= to save it into a collection; Ctrl+Shift+4 saves a screen area as a picture. Keyword search works offline across every collection. When you need an answer, ask Ret, the built-in AI. It replies from your own notes, and every answer has numbered citations that open the exact note, picture or PDF page it used. Ret needs internet and Google sign-in, and it changes notes only after you approve. Claude Code and Cursor can also search your notes. Notes are encrypted on your computer. The free plan has no time limit. Pricing: Free; Pro from $20/month.