Hey there, and welcome to Cinder, an open source library for creative coding in C++. The Cinder project is just getting rolling, so you're showing up at a great time. Everyday we're working hard to improve and grow Cinder, and with your help and input things are only going to get better.
Cinder is released under the Modified BSD license. That means you can use the code however you'd like, and while we're hoping you'll contribute improvements to Cinder back to the community, it's not required.