JFormula for Mac

From japisoft:

Formula is a library for evaluating various mathematical expressions. User can evaluate instantly a string setting variables, adding its own functions or operators.

Main features:

• Decimal, string, boolean operators (or, and, not, xor...)
• Unicode
• High precision mode
• Boolean expression support : (AC), (A or B) and not ( C equals D )
• IF THEN ELSE expression
• Short expression format : 2x+3y
• Variable : A=(cos(PI + x )*2) + [y-x]^2
• Multiple lines expression : A = 1    B = A + 1 ...
• Functions with decimal, boolean, string or list arguments
• Override or add your operators
• Extend or add a new library dynamically
• Override any functions from the current library by your one
• Lazy evaluation for boolean expressions
• Evaluation tree produced by a pluggable parsing system
• Evaluation optimization for symbol value changes
• Standard library with 24 mathematical functions
• Use delegates for resolving unknown functions or symbols
• Support for multithreaded computing
• Many samples (library extension, graphes) for API interesting parts
• JDK 1.1 compliant (tested on JDK1.1.8, JDK 1.4 and JDK1.5)