What are some alternatives?
When comparing ReadMe and GitHub Desktop, you can also consider the following products
GitBook - Modern Publishing, Simply taking your books from ideas to finished, polished books.
SmartGit - SmartGit is a front-end for the distributed version control system Git and runs on Windows, Mac OS...
ReadTheDocs - Spend your time on writing high quality documentation, not on the tools to make your documentation work.
GitKraken - The intuitive, fast, and beautiful cross-platform Git client.
Docusaurus - Easy to maintain open source documentation websites
SourceTree - Mac and Windows client for Mercurial and Git.