Giggle is described as 'graphical frontend for the git content tracker (think of gitk on GTK+)' and is an app in the Development category. There are more than 25 alternatives to Giggle for a variety of platforms, including Mac, Windows, Linux, Android and Android Tablet. The best alternative is SmartGit. It's not free, so if you're looking for a free alternative, you could try GitKraken or GitHub Desktop. Other great apps like Giggle are Fork (Paid), TortoiseGit (Free, Open Source), gitg (Free, Open Source) and Sublime Merge (Freemium).
SmartGit is a front-end for the distributed version control system Git and runs on Windows, Mac OS X and Linux. SmartGit is intended for developers who prefer a graphical user interface over a command line client, to be even more productive with Git.
TortoiseGit is a Windows Shell Interface to Git and based on TortoiseSVN. It's open source and can fully be build with freely available software. Since it's not an integration for a specific IDE like...
Sublime Merge is a fast and intuitive git client built on the same performant platform as Sublime Text. FEATURES - integrated three-way merge tool, - side-by-side diffs - powerful search - syntax highlighting