Those looking for a secure, private way to send messages, videos, and pictures may want to check out Wickr. Available for iOS or Android mobile devices as well as on Windows, Mac, or Linux computers, Wickr is a messaging system that allows users to share text messages, voice messages, or a number of files to either another individual or to a group. All messages are encrypted, and Wickr does not collect user data. Individual users can also manage who can contact them or gain access to their address book information. Users can send and receive messages and files on multiple devices, while maintaining their privacy with a password.