Helix ALM - Helix ALM is the single, integrated application that lets you centralize and manage requirements, test cases, issues, and other development artifacts and their relationships.
Beyond Compare - Beyond Compare allows you to compare files and folders.
codeBeamer ALM - Integrated application lifecycle management (ALM) platform
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
Visual Studio Team Services - Visual Studio Team Services (VSTS) provides unlimited Git hosting, cloud build for CI, agile planning and continuous delivery.
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.