[cjsaylor]

I created a similar open source tool for this for work a few years ago called drill-sergeant: https://github.com/zumba/drill-sergeant

However, it leaves the scheduling mechanism up to you. We currently have it on a crontab on one of our build boxes that notifies hipchat hourly and a separate cron that sends an email digest once a day.

I also created a hubot integration as well, but it is out of date since we use the direct hipchat integration: https://github.com/cjsaylor/hubot-drill-sergeant