We launched just over a year ago (http://news.ycombinator.com/item?id=3207489) and we finally made good on our intension to release it as open source.

Thanks for all the feedback so far; it's made a big a difference for us. Not just with features and bugs but with motivation too.

We have a special free plan for people coming from Hacker News:

https://onetimesecret.com/