1. TinyOS, http://www.tinyos.net
2. The "moteLab" at Harvard University, http://motelab.eecs.harvard.edu/
3. The Wireless Sensor Network Laboratory (WSNL) at Stanford University, http://wsnl.stanford.edu/
4. The Embedded Networks and Applications Laboratory "ENALAB" at Yale University, http://www.eng.yale.edu/enalab/
5. Networked & Embedded Systems Laboratory (NESL) at University of California, Los Angeles, http://nesl.ee.ucla.edu/