A thread similar to this was posted ~1 year ago by illdave. I think it's time for an updated 2014 version.
If you have any side projects that you've built and that you no longer have time for, list them here and let's see if others want to buy it from you.
- http://www.tweepsect.com/ - Gets 300,000~600,000 pageviews per month (about 1/6 uniques), makes a couple hundred bucks from ads each month. Been around for almost 5 years.
- http://colorblendy.com/ - There's also a Chrome app (20k weekly users), website gets about 4,000~8,000 visits/month. I had some ideas for making a "Pro" edition with things like importing/exporting colors from/to CSS stylesheets. Probably need to do some more market research before diving into this.
- http://wedomainsearch.com/ - Few hundred visits per month, brand new (built several months ago). Fairly cool idea that is really valuable for founders/hobbyists, I use it all the time. Needs some love for promotion and monetization, though.
I love working on these little stand-alone projects (a few more here: http://shazow.net/, also my email address if you want to reach out), sometimes I wish I could just whip them out and sell them as a living but the code alone is never as valuable without putting in effort into growing the audience.