Komodo Edit for Perl, Python, Tcl, PHP, Ruby, Javascript Free Code Editor for Windows, Mac and Linux Komodo Edit is a fast, smart, free and open-source code editor. Switching your trusty code editor is hard, but give Komodo Edit (or its big brother Komodo IDE) a try: it'll be worth your while. Windows, Mac, Linux? Yes. PHP, Python, Ruby, JavaScript, Perl, Tcl, XML, HTML 5, CSS 3? Yes, with (customizable) syntax coloring, folding, background syntax checking, and excellent auto-complete and calltips (we call it "code intelligence"). What else? Fast open (no more slow poking around for files); remote file editing; Vi keybindings (good ones); and a toolbox with shell command integration, macros and code snippets... all wrapped around a tricked-out editor and an extension mechanism the same as Firefox's.