MARF is a general cross-platform framework with a collection of algorithms for audio (voice, speech, and sound) and natural language text analysis and recognition along with sample applications (identification, NLP, etc.) of its use, implemented in Java.
JetClass, Java net-class application, allows virtual lectures to be held by teachers and students located in front of their computers, somewhere around the globe. It's written in Pure Java, relying on CORBA for network communications.