Coccinella is a free and open-source chat client with a built-in whiteboard for improved collaboration with others. Other key features of Coccinella include:

• File transfer
• Plugin system
• Group chat (MUC)
• Avatars and emoticons
• Secured connections (TLS and SASL)
• Open standard instant messaging protocol (*)

Coccinella is multi-lingual, internationalized and cross-platform.
Also available for Windows & Linux.