 Solve2Go Solve2Go  supports solving equations and inequalities by means of conjectures based on visual thinking. Conjectures can be refuted or supported by examples provided by the tool, and should be proved using symbolic manipulations on paper.
Equations: when we want to know for which values of x the two functions are equal   CASIO SCIENTIFIC CALCULATOR Rate it   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   XCalc V 1.5.0 XCalc V 1.5.0   MIDP Graphing Calculator MIDP Graphing Calculator  A graphing calculator for Java MIDP cell phones.
It actually implements a small programming language, parsing expressions into trees. One can define functions with an arbitrary number of parameters, and use the functions in java.lang.Math in addition to the normal operators 

 Javia Calculator Javia Calculator  easytouse calculator for mobile phones. It features a user interface designed for the mobile phone's keypad, which allows quick input of mathematical expressions.
Builtin functions include trigonometric and hyperbolic functions, logarithms and exponentiation, permutations, combinations and factorial   EasyCalcFree EasyCalcFree  A very simple calculator. Enter a list of up to 10 numbers, add labels.
Comes with hyperintelligence: You can write *, x, /, div, divide, subtract, plus, minus, times, takeaway, or pls, tms, add...you will still get the same result   Graphing Calculator V1.01 Graphical function plotting software. Use this software to represent any function of one variable, f(x)   Touch Calc 60 (S60 5th Edition) Touch Calc 60 is a full screen scientific calculator. Simply enter the expression you want to calculate and hit '=' key to evaluate   PCalc for Java PCalc for Java  Programming calculator. You can write programs for stack machine (with simplified Java like instruction set). Program consists of one or more procedure which can be nested. It is possible to access variables of top procedure (like in Pascal). You can execute program stebystep and inspect stack and variables in debugger 
