Toxic

This is a Tox-based instant messenging client which formerly resided in the Tox core repository, and is now available as a standalone application.

Tox is a secure and distributed Skype replacement.

At its heart it’s a client dealing with its core library communicating on its own protocol. All communications are encrypted using the peer audited NaCl cypto library and this encryption can not be turned off.

Tox is powered by a distributed network which uses P2P connections for chats between people, unlike other Skype replacements no federated servers, centralized servers, or supernodes are used.