100daysofCode

100 Days of Code is a great accountability tool. I found the community on Slack and Twitter to be very supportive.

There are no drawbacks as such, but I did notice that people sometimes spent more time than I thought they needed to agonizing over what really counted as a day of coding, whether they needed to start over from the start if they missed a day or two days, whether they could take short break for a family vacation and still continue a streak, etc. It's a public accountability tool, but in the end, you're only really accountable to yourself. Do what feels right, but honest and upfront about it. That's it.

A great, supportive community (at least when I was using it)

None.