Spuc's open source filters

Type : Elliptic, Butterworth, Chebyshev
References : Posted by neolit123 at gmail dot com
Notes :
http://www.koders.com/info.aspx?c=ProjectInfo&pid=FQLFTV9LA27MF421YKXV224VWH

Spuc has good C++ versions of some classic filter models.

Download full package from:
http://spuc.sourceforge.net