We regularly contribute to open source projects and have started several libraries and projects.
If you're using one of our projects and need it to be extended, we're happy to do that.
Strider is an Open Source Continuous Integration & Deployment Server - and it's written in node.js
These c++ bindings to the popular opencv library allow node to do advanced computer vision. They're widely used in conjunction with node-ar-drone to do real time imaging from quadrocopters.
We host our open source projects on github, so a more comprehensive list of projects can be found by looking at our profiles: