What are some alternatives?
When comparing Mercurial SCM and TortoiseGit, you can also consider the following products
Atlassian Bitbucket Server - Atlassian Bitbucket Server is a scalable collaborative Git solution.
GitKraken - The intuitive, fast, and beautiful cross-platform Git client.
Visual Studio Team Services - Visual Studio Team Services (VSTS) provides unlimited Git hosting, cloud build for CI, agile planning and continuous delivery.
SmartGit - SmartGit is a front-end for the distributed version control system Git and runs on Windows, Mac OS...
Perforce - Self-hosted Version Control Software
SourceTree - Mac and Windows client for Mercurial and Git.