Public key crypto for everyone, publicly auditable proofs of identity. Keybase is a new and free security app for mobile phones and computers. For the geeks among us: it's open source and powered by public-key cryptography. Keybase is for anyone. Imagine a Slack for the whole world, except end-to-end encrypted across all your devices. Or a Team Dropbox where the server can't leak your files or be hacked.
Need a team chat application as a part of your collaboration tool suite? Here are four open source chat applications that will help your team stay connected.