Acompli - iPhone email just got a promotion
Encrypto - Encrypto lets you encrypt files before sending them to friends or coworkers.
Send - Instant messaging meets email (by Microsoft)
MagicPad - Free, simple, and private, offline text encryption suite.
Brosix Instant Messenger - Secure instant messenger for your team
Tresorit - Encrypted cloud storage for your confidential files. Using Tresorit, files are encrypted before being uploaded to the cloud. Start encrypting files for free.