Green Messenger - WhatsApp Messenger Web for Chrome. Text/Chat on computer. Notifications, messages, tools.
Encrypto - Encrypto lets you encrypt files before sending them to friends or coworkers.
WhatsApp Web To Go - WhatsApp Web client for your phone/tablet with media support
MagicPad - Free, simple, and private, offline text encryption suite.
App for WhatsApp by coldX - Integrated WhatsApp functionality on the Desktop.
Tresorit - Encrypted cloud storage for your confidential files. Using Tresorit, files are encrypted before being uploaded to the cloud. Start encrypting files for free.