Jep is a Java package for parsing and evaluating mathematical expressions. It currently supports user defined variables, constants, and functions. The open-source Jep project was halted in favor of commercial development of version 3.0 upwards.
Seems to be closely related to Cellular automaton, except this creates a complex pattern from a mathematical function you input. See website for examples/live applets. This program makes use of an old GPL version of the JEP equation parser.
Graph polynomials and view prime numbers on a ulam spiral graphing plot. Only integer numbers. Based on an old GPL version of the JEP equation parser. See website for additional examples/live applets Seems to be closely related to Cellular automaton.