FarSight Free Calculator
Farsight Calculator is a feature-rich professional calculator with easy-to-use interface. You can perform arithmetic operations in either RPN (Reverse Polish Notation) or ALG (Algebraic) mode.
   Farsight Calculator is a easy-to-use programmable calculator which allows you to save your calculating process as a program or a function, and perform arithmetic operations in either RPN (Reverse Polish Notation) or ALG (Algebraic) mode. Over one hundred functions are supported, including algebraic, trigonometric, hyperbolic, statistical, and financial functions.  
  Arithmetic Functions
SQRT Returns the square root of X
Recip Returns the reciprocal of X
sqr Returns the square of a number
Abs Returns an absolute value
Ceil Rounds variables up toward pos infinity
Exp Returns the exponential of X
Fact Returns the factorial of X
Exp Returns the exponential of X
Fact Returns the factorial of X
 
  Statistical Functions
AVG Returns the average of all values in an
  array.
Sum Returns the sum of the elements in an
 array.
Min Returns smallest signed value in an
  array.
Max Returns largest signed value in an
  array.
Norm Returns the Euclidean ''L-2'' norm.
StdDev Returns the sample standard
  deviation for elements in an array