Overview of research prototypes
ELVIN [http://elvin.dstc.edu.au]
Gryphon [www.research.ibm.com/gryphon]
LeSubscribe [www-caravel.inria.fr/LeSubscribe]
READY [www.research.att.com/~ready]
Salamander [www.eecs.umich.edu/rmalan/salamander]
SIENA [~cs.colerado.edu/users/serl/dot/siena.html]