Now that it's almost 2014, I thought this would be a good place and time. Tell us what you made this year!
Here, I'll even start.
In January I made http://wagr.herokuapp.com/ in a weekend. It takes a future-dated wager and, if things are still working, emails you on the date you told it to remind you to settle up.
In April I made http://www.redditlater.com/, which is basically Buffer for Reddit.
In May, I made https://addressbin.com/, an email-marketing service with few features to discern it from a circa-1990 mailing list.
In June, http://learnxinyminutes.com/ was hastily assembled and released. It contains community-provided quick code references for way more computer languages in way more human languages than I ever expected. This was probably the best thing I did this year. You may recall tutorials from this set hitting HN repeatedly for a short time until everyone was sick of it.
In December I rewrote the marketing copy for Address Bin to produce https://easyecourse.com/, which provides trickle email campaigns with a minimal interface.
But enough about me. What did you build in 2013?
-I made a wilderness survival game for 7DRL 2013. http://humbit.com/rogue/ It's not for everyone, but it did make a "Best of 2013" list for roguelikes.
-I made my own static site generator in PHP that uses S3/cloudfront. Because why not. The result is a fast blog I think looks great. http://jere.in
-I made Autumn.js, a library for hashing keys to colors. https://github.com/nluqo/autumn
-I just finished up (and am desperately looking for feedback on) http://letspaste.com/ a gaming screenshot site. I think this is a really neat idea, but I'm not sure if anyone gets it yet. It did teach me about a few JS libraries though: packery and hopscotch
My goal for 2014 is to start writing things people actually need/want and to get off of Dreamhost ASAP (yea I know).