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.
ProCalc-5 Today to buy an excellent scientific calculator is quite difficult if you do not know where to search for it, and everything else besides, if you have to buy it is worth paying attention to its price
NumBasis NumBasis is a basis tool converter for integer numbers written in any of the main numeration systems (decimal,binary,octal,hexadecimal).It supports large number formats(5-digits hexa,7-digits dec) and fast calculation
HorsePower HorsePower is J2ME scientific calculator optimised for use on mobile phones, with the appearance of the classic range of Hewlett Packard calculators (MIDP 1.0 and CLDC 1.0)
Frink Programming language and calculating tool designed to solve real-world problems. It converts between units of measurement, currencies, does date-time math, and more