The website of Alienbrain: http://www.alienbrain.com. The official definition is: an asset management system for computer images and digital entertainment projects.
Powerful Structure Management Complete Version Control Effective Control Workflow Tool Team Collaborative Work Ability
Ability to support all format files, including 3D models, textures, video, audio, code, and office files. So AB is often used inside the game development company. I first touch the impression: it is a "big" software, installation, and more operational steps. There is file browsing window inside, you can do it directly, it is very intuitive. Alianbrain can specify exclusive lock mechanism in the check out file, or Multiple Check Out, like CVS, SubvSersion.