UNA for OS X

"UNA is a real-time collaborative development environment for software engineers."
By SoftCns Editor: UNA is a real-time collaborative development environment for software engineers, developed by N-BRAIN, Inc. UNA features a real-time collaborative editor, collaborative whiteboard, collaborative note-taking, and an integrated chat system, in addition to all the standard features of programmer editors. The standard features include external tool integration, which permits developers to compile and test programs from inside the UNA environment, regular expression search and replace, incremental search, syntax highlighting and grammar-aware features for more than 20 languages, seamless support for version control systems, source snippets, auto-complete, block editing, and much more.