A CMS built on the non-blocking web server/framework Tornado.
Prowl extension for Chrome.
A compact widget for sharing your most recently listened to tracks on Last.fm. Demo at http://files.callumj.co.uk/lastfm-widget/demo.html.
A really simple script for fading images as they enter the viewable window. Demo at: http://files.callumj.co.uk/image-fade/demo/demo....
A Find My Friends clone based on HTML5 Geolocation and WebSockets.