Burn Note offers encrypted online communication between two people as “privately as a spoken conversation”. Feel like a spy sending email to others that delete after they are read. There’s also TMWSD, which allows you to send encrypted messages with a secret password.
If you need free encrypted email, try Sendinc or Lockbin. Both are easy to use and better then Hushmail! If you need to send encrypted files, use Secure Zip with Sendinc (Lockbin doesn’t allow secure attachments).