Yocto Project
For my day job I work as a software engineer on the Yocto Project, primarily developing the Poky platform builder.
We make it easier to build GNU/Linux based embedded devices.
Moblin
In the past I worked on the Moblin project. I developed the Network
Panel (carrick) and the Bluetooth Panel (built on gnome-bluetooth).
Home time Hacking
I wrote a Web OS London Underground application to
scratch an itch for my (then) girlfriend (now wife), it's called
Blunderground.
As any geek I wrote plenty of code which doesn't get
published. Most of that, these days, is related to computational
intelligence and robotics.