focus101 is totally the best one and I'm not saying that because I built it :D

Tried most of them! Caveday is just too many people in a room and the rest are really awkward just one-on-one. Flow club hits the midpoint, with 4-8 people in there, everyone has stated goals and it's obvious when someone is missing their goals.

It can still be a liiitle hit or miss depending on the club host. But a good host on a pomodoro session with actual verbal check-ins is 100x better than coffee.

Focusmate discussed on HN before, eg.

https://news.ycombinator.com/item?id=21352305

Focusmate – Virtual Coworking Helps You Get Things Done, 64 comments