"Excel Solver" like capability in Linux
Is there an open source program that offers the optimization capabilities that Excel's solver does? My Gnumeric spreadsheet has a built in solver but it doesn't work. It won't let me enter constraints and the GUI won't let me choose to maximize or minimize my formula.
How about Excel's data tables? Is something like that available?
I am using Mandrake 9.2 and Gnumeric 1.2.0.