Damage calculator.

mmm... in one of the threads, the VT users were accused of oversimplifying the game...

VT corrupts with its excessive polish and simplification

The existence of such programs essentially simplifies the decision-making process, pushing the study of the game's physics and, in particular, the physics of combat (and its mathematics) into the background.
I recommended supplementing the regulations for the offline CIS-2013 tournament with a ban on the use of any software products, with the exception of a standard calculator, that would allow any advantage in the game.