We started a new project: Cryptex.email
Cryptex.email is a free, reliable encrypted messaging system. Cryptex encrypt/decrypt your messages on the client side, in your browser, so it is very secure (we don't encrypt/decrypt the messages on the server, so nobody can decrypt them only you).
We use Openpgpjs, which is a PGP implementation to encrypt your messages.
Happy messaging
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)