quantum Q113 8-dip:
http://parts.digikey.com/1/parts/951410-sensor-ic-touch-proxmty-1ch-8dip-qt113-d.html

atmel Q-Matrix:
http://www.qprox.com/technologies/qmatrix.html

quantom QT1080-ISG:
http://parts.digikey.com/1/parts/951458-ic-sensor-qtouch-8chan-32qfn-qt1080-isg.html

http://www.digikey.com/scripts/us/dksus.dll?Detail&name=427-1090-1-ND

quantum QT150:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=QT150-DG-ND