This is the repository for Optolith, a desktop application for The Dark Eye 5th Edition.
You can download the app here (German page) or here here (English page) (same app on both pages). You'll get an installer for Windows and a DMG for Mac, both with Auto Update support. For Linux, you get an AppImage, which should support Auto Update but it doesnt seem to work currently.
It is available for Windows 7+ as well as for Linux (Ubuntu 12.04+, Fedora 21, Debian 8) and macOS 10.9+ x64.
Info on reporting bugs, getting help, contributing code and more can be found in the Contributing Guide!