1)   Bopup Communication Server 4.0.1
Instant Messaging (IM) server for internal and secure collaboration over corporate and business networks. It provides Active Directory support, message and file archiving, offline messaging and document distribution with a strong encryption of data.

 2)   BigAnt Messenger for Enterprise 2.2
BigAnt Messenger for enterprise is a secure corporate instant messaging program, instant messaging, file sharing, voip, video chat and more.