Keybase has expanded from cryptocommunication into cryptocurrency by incorporating Stellar into their suite of apps (no official announcement yet). They now provide:

1. Identity - verify someone’s Stellar public key via public statements made by that person
2. Multi-device key management - manage your Stellar private key across many devices
3. UIs - cross-platform app for Stellar payments (a “Venmo” on Stellar)

Download the updated apps and try it out. Keybase supports federation, so your Stellar address can be represented by your Keybase username*keybase.io.