Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.
LAN Messenger - LAN Messenger is a decentralized UDP IM-style chat client which supports usernames...
Seald - Keep your conversations secure, everywhere.
MyChat - Secure instant messenger for any network
ProtonMail - Secure email with absolutely no compromises. Get your free encrypted email account today.
BORGChat - BORGChat is a LAN messaging software program.