For Home Computer/Network Use

Skydog: http://www.skydog.com

OpenDNS: www.opendns.com/home-internet-security/parental-controls/opendns-home/

Spector Pro and eBlaster: http://www.spectorsoft.com/home-solutions.html

Webwatcher: www.webwatcher.com

For mobile phones:

eBlaster Mobile:http://www.eblaster.com/eblaster-mobile.html

Phone Sheriff:http://www.phonesheriff.com/