Buzz (Block)
Open-source workspace from Block where a team and its AI agents share the same room — chat, planning, project tracking, code and pull requests in one place, with agents you configure for your own workflows. Currently a developer preview; the app is open source on GitHub, with a waitlist for a paid enterprise version.
From the site: Come test the early stages with us.
Why I recommend it: Early-stage, so treat it as something to try rather than to run a team on. The interesting part is watching how human-plus-agent teamwork gets designed — useful reading if you want to talk credibly about agents at work. The open-source app is free to run yourself; the enterprise version will be paid, and there is no published price yet.
