1)   CalculatorX 1. 2. 6688
CalculatorX is an enhanced expression calculator. It supports common operations, constants,built-in and custom functions, variables and note-lines. You can even use Binary, Octal, Decimal and HEXadecimal numbers in one expression to evaluate as well.

 2)   FNA 1.31a
Multi-function calculator and unit conversion utility. Four modes of operation (statistics, trigonometry, base-n, and unit conversion). Many functions, formula entry mode. Up to 26 separate memory registers. Even includes periodic table of elements.