Most IDE's have built-in Git integration, but as far as I know, SourceTree is the only thing that integrates with the additional features (=pull requests) of Stash.
In Visual Studio, the Microsoft Git Provider is part of the main program since the 2013 version and installable as an add-on for 2012. (Not sure about the other IDE's you mentioned.)
Supported Platforms macOS Sourcetree has a lot to offer and, like many developer tools, finding and using it all can be a challenge, especially for a new user. Everyone might not love ...
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