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.
Scientific Calculator 2D This application makes it possible to use your mobile phone as a scientific calculator. You can plot multiple mathematical functions
TouchMaths_ME The program TouchMaths (for touchscreen mobile phones) contain a set of revolutionary mathematical applications (Professional Calculator, Graph 2D, Function solver, Integral solver, Equation solver and Linear system solver)
TVH-72g Graphing Calculator Graphing calculator for the educational use of schools and students who may have difficulty, are unable or may not wish to acquire a stand-alone feature-laden graphing calculator