Calculators that you can use to make things easier

[Bugsbunny]

My favorite calculator is Calc98.
http://www.calculator.org/
This is freeware - and is a great product with TONS of features. I actually have the paid version ($11.95) on the pay for reasonably priced good software theory - even though the freeware version was doing me just fine (this was years ago).

This calculator has functions built-in for combinatorics (stats mode) - and also has the ability to do fractional math.

I won't list all the functions, but here's the modes (note that since I have the paid version some of these may not be on the free-ware version).
Decimal
Binary
Octal
Hexadecimal
BaseN
Angle
Time
Finance
Statistics
Matrix
Complex
Roman
Fractions
IP address
Feet/inches

It also has a ton of built-in conversions. The one thing it's missing is a tape type feature for storing a string of results - you have to copy or store results of individual calculations for use further on. And you can't enter a long calculation with lot's of terms in one shot. For that I use my next option:

Next option would be Google's built-in calculator functions

http://www.google.com/intl/en/help/features.html#calculator

There I could enter something like the following:
To find the percentage of flopping a 4 flush, or a made flush, when holding 2 suited cards:

[Holgininho]

Does this calculator have a combination button? I've installed the calculator, but I can't find it.

[Bugsbunny]

[Holgininho]