This page summarizes freely-available FIR filter design software that is available, most in source code form, on the net.
Much commercial software is available for designing filters.
Information on commercial packages is outside the scope of this page. I don't have the knowledge or resources to track the latest developments or to maintain an inventory of commercial sites of DSP vendors. DSPnet and Ebox perform that function already. I maintain this page as a public service. If you discover a broken link, perhaps you could spend a few minutes searching.