Sensors
inteface-z: http://www.interface-z.com/
products, publications and advices about sensors (fr)
tangible media group : http://tangible.media.mit.edu/
tangible interface research and projects
sensorswiki : http://sensorwiki.org/index.php/Main_Page
wikipedia community for sensors
sensormag: http://www.sensorsmag.com/sensors/
electronics componants in Brussels :http://www.elak.com/
multisensor screen interface : http://ted.com/tedtalks/tedtalksplayer.cfm?key=j_han&flashEnabled=1
Software
Max-masp: http://www.cycling74.com/products/maxmsp.html
Pure data : http://www-crca.ucsd.edu/%7Emsp/software.html
other links on : http://www.erg.be/multimedialab/cours/logiciels/pure_data.htm
Pd is opensource and made for live audio and multimedia applications.
Processing : http://processing.org/
Processing is an open source programming language and environment for people who want to program images, animation, and sound.