An open source PDF viewer/editor with it's own blazing fast rust engine
Open Paper is a workbench for managing your research library. Read, annotate, and understand your papers all in one place. Use an AI assistant to conduct your literature review.
Backchannel brings the internet's conversations into whatever you're reading. It blends Hacker News, Bluesky, Reddit, and more into a single discussion thread beside any page, then brings those sources together into a blended front page when you're ready to find something new.
A drawing, note-taking and book annotation app for KOReader, built for e-ink: drawings with layers, notebooks with handwriting to text, ink on EPUB, MOBI, PDF and comics that follows the text, and stylus support with palm rejection and pen pressure.