I have been using Safeswiss for a while now and found it exceptionally good. The new Droid update looks very modern, some really need features that you don't find on other messengers, push to delete anytime works very well, I also like signup requires no phone number or email, Unlike Telegram, all messages & voice calls are fully encrypted by default - Very good worth a try
Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.
Chatterino - Chatterino is a chat client for twitch chat.
ProtonMail - Secure email with absolutely no compromises. Get your free encrypted email account today.
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Signal - Fast, simple & secure messaging. Privacy that fits in your pocket.
multiChat for Twitch - multiChat for Twitch is an incredible free-to-use chat application that is designed to aid users to have the best possible ad-free Twitch.tv experience right from their mobile devices.