Seald - Keep your conversations secure, everywhere.
PhoneLeash: SMS/MMS forwarding - PhoneLeash: SMS/MMS forwarding app offers features that let you forward your desired text messages and multimedia messages to your email or your other mobile phone so that you can access them later.
Crypho - End-to-end-encrypted messaging and file sharing
Cellcrypt - Cellcrypt app provides features so you can enjoy secure conference calling, messaging, and sharing of documents.
Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.
YAATA - YAATA app offers features that let you send multimedia files such as images, videos, audio, and GIFs, etc.