A few I can think of - Note taking app that stores all data as markdown on Dropbox - When I was getting married I created a photo upload site with a flickr ba

A few I can think of - Note taking app that stores all data as markdown on Dropbox - When I was getting married I created a photo upload site with a flickr backend where people could bulk upload all of the photos they took of our wedding, and as a result we got thousands of photos without needing to chase people up for memory cards etc. - Every year I organise Secret Santa for all of my family and my wife's family through a PHP web app I wrote.