DocGen - Static website generator
GitKraken - The intuitive, fast, and beautiful cross-platform Git client.
openSourceCM - Web-based legal document processing and contract management
SourceTree - Mac and Windows client for Mercurial and Git.
LogicalDOC - A document management system such as LogicalDOC can help your organization better manage business processes and put order in the chaos of documents every day run your business.
GitHub Desktop - GitHub Desktop is a seamless way to contribute to projects on GitHub and GitHub Enterprise.