GitHub is a hosting service for distributed projects that use git as their version-control system. It allows free hosting and management of open-source projects and facilitates collaborative development on the source code. Using GitHub for non-open-source endeavours requires additional fees.

The code and documentation of TiddlyWiki is hosted on GitHub at:

https://github.com/TiddlyWiki/TiddlyWiki5

GitHub also offer a free web hosting service called GitHub Pages that can be used directly from the single file configuration. See Saving to a Git service.

An alternative to GitHub is GitLab