In 2011 the dev team I was on went to Pivotal Labs for a few months to bootstrap a rebuild of our company’s site, and learn their style of "extreme programming". We used a tool to organize our weekly retrospective meetings which I felt was remarkably useful and easy, but it’s since disappeared and I haven’t found a web-based replacement.
The site was actionitems.us, it was bare-bones and did just one thing and felt easy to use and understand. In a nutshell:
users are collected into teams
team has an upcoming meeting
team members can submit thoughts/topics for upcoming meeting
members can rank topics in order of what they’d like to discuss
members can comment on existing topics whenever
when meeting starts, ordered topic list is the agenda
I felt that it was a great tool for our team. It was fast enough to use that any thoughts on the current dev cycle (code, ops, design, administrative, office-related…) could be quickly recorded, and then it got out of the way. We would try to develop action items out of any pain point topics we discussed.
I haven’t found something like it. Could be a fun open-source project.
(In the meantime, stickies.io, though lacking the voting/ranking feature, has been a decent replacement.)