All software available here is free.
MathPad
Sintium MathPad is a math language interpretor that allows you to enter mathematical statements into a notepad-like interface. You can assign variables, define functions and convert units. It automatically evaluates everything you type as you type it and automatically updates anything dependent on a variable that has been changed or a function that has been redefined. [ MathPad ]
BoomShield
Once you run this program, the next time you press a button on your mouse, the shield will popup and you will loose access to your computer! The only way to stop the program with the shield up or even with it down, is to type in "kill" and then press the Enter key. You can read the .txt file to see all of the commands available. This program does NOT install anything or change any settings on your computer. [ BoomShield ]