Design and implement digital FIR and IIR filters - Simulink
TFilter, the free online FIR filter design tool - Free online IIR Filter Design Tool, Filter Testbench, FFT library and scripting environment at http://almafa.org/docs/iir.html. For more information visit http://almafa.org/. | Facebook
FIR Filter tools
Classical IIR filter design: a practical guide - ASN Home
IIR Filter Design Procedure - YouTube
Mathematics | Free Full-Text | Comparison of Circular Symmetric Low-Pass Digital IIR Filter Design Using Evolutionary Computation Techniques
MATLAB Filter Design Wizard for AD9361 [Analog Devices Wiki]