Guitar is described as 'Git GUI Client' and is an app in the Development category. There are more than 25 alternatives to Guitar 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 GitAhead. Other great apps like Guitar are Sourcetree (Free), GitHub Desktop (Free, Open Source), Fork (Paid) and TortoiseGit (Free, Open Source).
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