Coccinella

Coccinella is a free and open chat client available for Windows, Linux and Mac. It's a great way to stay in touch with friends and family, and offers a number of features that make it a powerful communication tool.

Coccinella features include:

- Text chat

- File transfer

- Group chats

- Emoticons

- Protected connections

- Support for standard IM protocol

Coccinella is also highly customizable. You can change the look and feel of the client to suit your own preferences.