Member Since (Web, Ruby, Sinatra): Find out when someone registered their Yahoo! account. Quickly share that information on Facebook, and view Wikipedia’s Current Events page on that day, just because.
anthology (Terminal, Bash): Create an ePub from a list of web articles. Inspired by Readlists by Readability.
Exercise Genius (Open-source, iOS, Objective-C): Exercise tracking app for runners. Winner of Best Student Team and Microsoft’s Best Use of HealthVault APIs prizes at Cajun Code Fest hackathon (Louisiana, USA).
ADUpDownControl (iOS, Objective-C): An iOS6-era stepper control for picking font size.
TumblrStats.com (Open-source, Web, Ruby, Sinatra): Learn random facts about your tumblelog: when you registered your Tumblr account, how many posts you made, how often you create a new entry, etc. Achieved 500,000+ visits.
undistractify (Web, PHP, CakePHP): Convert regular web bookmarks into rate-limited ones to help deal with procrastination and better manage one’s digital wellbeing. The user can only access websites via these special bookmarks every few hours (or days).