I love these and do them too. I built an app to search craigslist in 2007 across multiple neighborhoods and regions and plot the results on a map. This was ro

I love these and do them too. I built an app to search craigslist in 2007 across multiple neighborhoods and regions and plot the results on a map. This was roughly 6 or 7 years before Craigslist added these features I think. I found a great apartment with it, as did some friends. Fun, and learned some cool stuff. Another one was a Wordpress plugin for Facebook comments before Facebook released the official one and the existing ones were hard to use. People loved it, and again I learned a lot. Side projects rock!