Floobits - Floobits brings real-time collaborative editing to text editors, IDEs, and now Atom.
codebeat - Automated code review for Swift
GitLive - Extend Git with real-time collaborative superpowers
Codacy - Automatically reviews code style, security, duplication, complexity, and coverage on every change while tracking code quality throughout your sprints.
Keyory - Schedule periodic emails and get aggregated responses delivered right to your inbox with Keyory.
CodeStream - CodeStream helps development teams resolve issues faster, and improve code quality by streamlining code reviews inside your IDE