Movim

Movim is a chatting application that lets you start a conversation with a friend
or join a multi-user chatroom in one click.

Movim is fully compatible with many chat clients on all the common devices. No matter what your contacts are using, you will always be able to chat with them. You can insert pictures and documents
in your conversations. If you were offline for a while, Movim automatically refreshes your conversations history. In addition, it keeps your conversations synchronized between all your devices, in real time.