Subversion is an open source version control system. Founded in 2000 by CollabNet, Inc. Subversion is developed as a project of the Apache Software Foundation, and as such is part of a rich community of developers and users. Subversion is an open-source, centralized version control system characterized by its reliability as a safe haven for valuable data; the simplicity of its model and usage; and its ability to support the needs of a wide variety of users and projects, from individuals to large-scale enterprise operations.
In order to install the full version of Team Foundation Server, you would require one server license and a client license for each developer. The server license costs about $500 and the client license costs about theVersion Control Systems Microsoft Team Foundation Server