Komodo IDE has it.<p>At the text-editor level, SubEthaEdit has it, and the same library is used by Coda (and thus they are compatible)<p>I vaguely remember there as a company providing plugins for multiple IDE&#x27;s to accomplish some kind of pair programming - ah i found it: <a href="https:&#x2F;&#x2F;floobits.com" rel="nofollow">https:&#x2F;&#x2F;floobits.com</a>