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.
ScienCalc Convenient and powerful scientific calculator
SplineCalc Multipurpose scientific calculator with ample opportunities and high precision
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.
CalcPac RPN CalcPac RPN is a powerful business calculator
Math Worm Math puzzle where your worm navigates a maze.
IOSO NS GT Tool for nonlinear constrained optimization