LP100 is a linear programming optimizer developed for either maximizing or minimizing small to medium sized mathematical programming problems in which all the relationships between variables are linear. It finds a BEST feasible solution to any continuous or all-integer constrained optimization problem of this type and reports on the activities and levels required to maximize profit or minimize cost. LP100 also reports on alternate optima, shadow prices, and ranges over which the shadow prices are valid and also ranges over which profit/cost inputs and right-hand-side (RHS) values can vary without altering the solution.

LP100 is shareware.

Look at the readme file from the program.