UNA for Linux
UNA is a collaborative development environment for software engineers that integrates a real-time collaborative editor and standard programmer editor features, designed by N-BRAIN, Inc.
N-BRAIN, Inc. 
UNA for OS X
UNA by N-BRAIN, is a software development tool that facilitates real-time collaboration among software engineers in a single environment. It features a collaborative editor that combines with regular features of a standard programmer editor.
UNA for Windows
UNA by N-BRAIN, Inc. is a collaborative software development environment for engineers. It provides real-time collaboration and standard programmer editor features in a single package.