TimesUpKidz
http://www.timesupkidz.com/tour/getstarted

ComputerTime
http://www.softwaretime.com/computertime/screen-shots/see-computertime.html

Kids PC Time Administrator
http://www.pchomesoft.com/limit_kids_pc_time.html

Access Boss™
http://fspro.net/access-boss/

Computer Time Limiter
http://www.suncross.nl/ctl/

Time Monitor 1.2.6
http://www.geardownload.com/security/time-monitor.html

SentryPC
http://www.sentrypc.com/sentrypc.htm

Time Boss
http://nicekit.com/parental-control-software.htm

!!! http://limit-computer-time.com/index.html