Readium Desktop is a modular toolkit easing the development of desktop reading applications. The toolkit handles ebooks (EPUB or PDF), audiobooks (W3C and Readium formats) and comics (CBZ and Divina formats). It is written in Typescript and is based on node.js and Electron.js.
This repository does not contain the actual code, but is rather used as a “compass”, listing the different modules that constitutes the toolkit.
There is also:
EDRLab is developing Thorium Reader, a free, open-source, accessible, LCP compliant, multi-lingual Windows10/MacOS/Linux reading application. Its Github repository is edrlab/thorium-desktop