SecurDesk! 5.32
A complete desktop shell replacement with a wealth of options for controlling access to important materials, hiding confusing and irrelevant items from selected users, simplifying training tasks, etc. Includes a desktop interface which can be custom designed, file management, virtual desktops, data protection, log-in protection, delayed launch, prevent Ctrl+Alt+Del, set timeouts to log-off users, limit usage periods, expire user permissions, more

ClockLock 1.0
A Windows service which continually checks whether the logged in user is authorized to use the computer at this time. If not, then it forces the user to logoff and remains locked until the unrestricted interval begins.