ESLint - The fully pluggable JavaScript code quality tool
CodeClimate - Code Climate provides automated code review for your apps, letting you fix quality and security issues before they hit production. We check every commit, branch and pull request for changes in quality and potential vulnerabilities.
JSLint - JSLint is a JavaScript program that looks for problems in JavaScript programs.
JSHint - New JSHint website. Anton Kovalyov Oct 1st, 2013. For the last couple of weeks I've been working on a new homepage for JSHint and today I'm proud to announce the new jshint. com! JSHint Website.
SensioLabs Insight - PHP Project Quality Done Right.
FileDiffs - Show diffs between the current file, or selection(s) in the current file, and clipboard, another file, or unsaved changes. - colinta/SublimeFileDiffs