Cryptocat – Open Source Encrypted Private Alternative To Other Chat Services
https://crypto.cat/

Cryptocat lets you instantly set up secure conversations. It’s an open source encrypted, private alternative to other services such as Facebook chat. Messages are encrypted inside your own browser using AES-256 and 4096-bit asymmetric keys. Encrypted data is securely wiped after one hour of inactivity. This will be added to Privacy Resources Subject Tracer™ Information Blog.