Commit Together by Github - Now add co-authors to your commits
codebeat - Automated code review for Swift
GitKraken - The intuitive, fast, and beautiful cross-platform Git client.
CodeStream - CodeStream helps development teams resolve issues faster, and improve code quality by streamlining code reviews inside your IDE
Source iOS - The best git client and code editor for iOS.
Codacy - Automatically reviews code style, security, duplication, complexity, and coverage on every change while tracking code quality throughout your sprints.