Jarhoo is a neat little web-based tool for finding out where the
class listed in the NoClassDefFoundError might be hiding.
In my initial unscientific tests, it only found classes from core APIs, though.
It couldn't find more obscure classes from various XML and Unicode APIs.
Hugues Pisapia and Marc Gimpel have posted JSpeex 0.9.5, an open source "Java port of the Speex speech codec (Open Source/Free Software patent-free audio compression format designed for speech). It provides both the decoder and the encoder in pure Java, as well as a JavaSound SPI." 0.9.5 is a bug fix release. JSpeex is published under a BSD license.