Kalk - This is a java calculator. This has some more features than an ordinary calculator. Other that performing the basic maths operations, this can calculate sin, cos, tan, log, asin, acos, atan and antilog of a number.

SolveMyMath_Scientific_Calculator SolveMyMath_Scientific_Calculator aims to help users perform complex mathematical equations with a deep list of functions. Thanks to its simple interface and helpful features, this program has the ability to help even those who are not natural mathematicians

UPN-Calc UPN-Calc is a RPN (Reverse Polish Notation) calculator for mobile phones.
· Arbitrary precision unnormalized BCD arithmetic.
· Arithmetic standard functions (approximated to arbitrary precision): sin, cos, tan, arcsin, arccos, arctan, 1/x, sqrt(x), exp(x), ln(x), y^x.
· Angle measure in DEG, RAD or GRAD

MC calculator Universal free, every day use calculator withscientific features. One of top.
Good for simple and advanced calculations! This calculator has got a LOT of functions

MobileMath MobileMath - MobileMath turns your mobile into a calculator supporting many operations such as: evaluate expression, plotting, differentiate & integrate expression...
Supports basic functions of a calculator:
· Operators : +, -, *, /, ^
· Functions : sin, cos, tan, exp, ln...
· Solve equations
· And much more..