OnePlaybook
http://oneplaybook.com
My first big project, I suppose.
OnePlaybook is an online coaching tool for various sports that features a lot of neat tools like announcements, play drawing, video and more. A coach can create a secure account that only he and his team can view or use.
This started as a venture that I thought would be my full-time job, and was for some time, but has become a hobby at this point. I like to update it with new features that I think of or coaches tell me about.
It was and still is an amazing learning experience. It started as a project using php, then was migrated to CakePHP for a beta version before getting built in ASP.NET in it's current form. Why the changes? At this point, not totally sure...