http://ineedaresu.me
I made it March 2015 and updated it December 2015. It's been sitting since, with a few thousand people using it every month.
It hit the #1 spot on Product Hunt, and after that it was posted about on Lifehacker, Inc., Newsweek, and others.
I've recently tried to spend time updating it to monetize it, but I just don't have the time to work on it.
Right now I make $100-200 per month from AdSense, but I really have no idea what I'm doing with it so nothing is optimized with the ads - they were just kind of slapped on there. I know it has potential to make money, I just don't have time.