The simple calculation system that can be extended by plugins. Main idea is to make possible to perform any calculation from one place.
You can try 2 available calculators (plugins) at the moment:
SimpleCalc
This is the simple calculator without standard GUI. So, you just need to enter your expression to perform calculation.
CreditCalc
This is the simple credit calculator. You need to enter some settings (amount, precent rate, duration) in order to perform calculation.
P.S. I want to add some new calculators for that system. Feel free to propose :).