CalcPac RPN CalcPac RPN is a powerful business calculator
GIPALS - Linear Programming Environment Linear programming environment to solve constrained optimization problems that are stated as linear programs with UNLIMITED number of variables and constraints.
TQ's FunPlot It is a function plotting software that plots any user-typed 1-D and 2-D functions. The generated plots are fully-interactive and document-ready.
IOSO NS GT Tool for nonlinear constrained optimization