MuPDF 1.28.5 is an AGPL document engine that reads PDF, XPS, EPUB and comic archives, ships a light viewer called mupdf-gl, and bundles nineteen command line tools for rendering, conversion and signing. The tag was cut on 25 September 2026.

Logseq is an open source knowledge base where every line is a block: inline it into an outline or point at it from another page. Daily notes, card review and queries cover writing, revisiting and gathering.

Anytype writes to the device first, syncs between devices over an encrypted peer to peer network where relays only forward ciphertext, and organises everything as objects that can relate to each other. Open source, free for personal use.

Tasks as ordinary lines of text with priority, dates, projects and contexts: readable by people, parsed by scripts, and portable between every editor and system you will ever use.

An open-source notebook that stores notes as plain Markdown on your own disk, encrypts them before anything leaves the machine, syncs through a service you choose, and runs natively on five platforms.