maximilian 0.2 released!
maximilian is a free, open source, cross platform audio synthesis library written in C++
There's an openFrameworks addon by me and Chris Kiefer (with initial help from Arturo Castro).
Download here. It's also compatible with ofxiPhone.
If you're interested in learning how to use maximilian on the command line, You can download it here:
You can check out some tutorials here, although the openFrameworks addon requires that you type ofxMaxi before any of the object names. Other than that, it's the same.