1)   DiffDog Standard Edition 2005
Altova DiffDog 2005 Standard Edition is the dedicated differencing utility for developers and power users. This easy, powerful synchronization tool quickly compares files and folders then highlights differences and merges content via an elegant GUI.

 2)   DiffDog Professional Edition 2008
Altova DiffDog 2008 is the developer’s dedicated differencing utility. This unique XML-aware synchronization tool quickly compares files and directories then highlights differences and merges content via its straightforward visual interface.