Note: as of 20180314 this file is quite stale (laste edited 2009). The currently supported versions of Samba are 4.6 and 4.7.
Samba is an Open Source/Free Software suite that provides seamless file and print services to SMB/CIFS clients. Samba is freely available, unlike other SMB/CIFS implementations, and allows for interoperability between Linux/Unix servers and Windows-based clients.
Release planning for Samba 3.0 (historical)