Element.io - Secure messaging app with strong end-to-end encryption, advanced group chat privacy settings, secure video calls for teams, encrypted communication using Matrix open network. Riot.im is now Element.
LocalCoinSwap - Community-owned P2P cryptocurrency exchange with no KYC and 95% cold storage wallet security.
ChatSecure - ChatSecure is a free and open source messaging app that features OTR encryption over XMPP.
Airbitz - A Bitcoin wallet, new, reads well.
Keybase Chat - End-to-end encrypted chat built into Keybase
LocalCryptos - LocalCryptos is one of the leading and secure peer-to-peer crypto marketplaces online.