Secure instant messaging system for team collaboration
avaamo - Simple, Secure Business Messaging
LAN Messenger - LAN Messenger is a decentralized UDP IM-style chat client which supports usernames...
SupportKit - Embed Zendesk support into your iOS app with 1 line of code
Softros LAN messenger - LAN messenger for an internal office chat for home or business users. It does not require a server and is very easy to install and use. It supports personal chats, group chats, message brodcasting, files transfer and remote desktop access.
Fleep for Business - Simple, open collaboration and chat with admin capabilities
Bopup IM Suite - Organize secure messaging system and communicate instantly via self-hosted IM server.