Hemlock is an open-source environment for building social applications, with a gaming focus. There’s a showcase of uses on the site.

[AudioBoo](http://audioboo.fm/) – a low coast, efficient way of generating audio reports. The platform collects pictures, geodata and so on at the time of recording, and pushes it into a social, connected, embeddable environment. Currently, it’s on the iPhone, with Android and web versions coming soon. And they’re adding an API which will allow others to build clients. 
Podcasting was too complicated, suggests SEO MArk Rock. The idea of AudioBoo was to make audio publishing as easy as possible. In the short term, they’ll monetise through pro services, from editing, to managing team contributions. 10 licences sold for the pro services – and it’s not built yet!