1)   AMarker 1.10
This provides alternative ways to launch programs and to protect your computer from erroneous mouse clicks. Just draw colored transparent regions over the screen and assign a mouse-click action to the area.

 2)   Clipboard Clear 1.0
Clipboard Clear allows you to secure your system by prohibiting the use of the PrintScreen key. It can also prohibit other general uses of the clipboard for greater security, if desired, so that no unauthorized user uses it.