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.
Enhanced Expression Calculator, scientific calculator, expression calculator, CalculatorX, custom function, Scientific notation, Base-N, evaluate, expression parsing, formulas,

 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.
fna, calculator, conversion, math, mathematic, trig, trigonometry, stats, statistics, base-n,