GitHub + Slack Integration - Full visibility into your GitHub projects right inside Slack
codebeat - Automated code review for Swift
GitCommands - An interactive reference tool for Git commands
CodeStream - CodeStream helps development teams resolve issues faster, and improve code quality by streamlining code reviews inside your IDE
&what; - interactive reference of 14,500 HTML character entities
Codacy - Automatically reviews code style, security, duplication, complexity, and coverage on every change while tracking code quality throughout your sprints.