Apps similar to Git+ Coach include Oh My Git!, which is free and open source. Other options are LearnGitBranching and Git-it. In total there are three apps like Git+ Coach for Mac, Windows, Linux and the web.
Oh My Git! is an open source game that introduces players to the popular version control system "Git". It is highly interactive, and aims at building intuition for operations like "merging" or "rebasing" branches.
LearnGitBranching is a git repository visualizer, sandbox, and series of educational tutorials and challenges. Its primary purpose is to help developers understand git through the power of visualization (something that's absent when working on the command line).
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Git-it is a cross-platform desktop app that teaches you how to use Git and GitHub on the command line.
