bitk.in, mojolicious and liteapi
I wanted to build a site that demonstrated how easy it was to take bitcoin and litecoin. After building LiteAPI in mod_perl and running into issues with performance and those wacky implicit closures, I decided to try an event driven framework, Mojolicious.
The site is https://bitk.in, and it allows you to spend bitcoin & litecoin to get fair-valued gift cards at big online stores like Amazon, Walmart, etc.
It uses the API from http://liteapi.org for Litecoin and Blockchain's wallet API for Bitcoin.
Bitcoin/litecoin integration was trivial. Mojolicious allowed me to spend more time focusing on integration with vendors and payment systems, and just about no time worrying about HTTP.
To be honest, I spent more time thinking about the color than the back end.