Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.
Pipedrive - Sales pipeline software that gets you organized. Helps you focus on the right deals, so easy to use that salespeople just love it. Great for small teams.
Keybase Chat - End-to-end encrypted chat built into Keybase
Zoho CRM - Omnichannel CRM for Businesses of all sizes
Crypho - End-to-end-encrypted messaging and file sharing
Freshsales CRM - A full-fledged CRM for high-velocity sales teams.