Filters and Filtering . Maintained by the American Library Association's Office of Intellectual Freedom, this resource contains news, ALA policies and statements on filtering, Internet Toolkit, legal information, and more.
CIPA . Maintained by the American Library Association, this resource contains information about implementing filtering to comply with CIPA, legislative history of CIPA, and ALA's position on CIPA.
CIPA FAQ . Bob Bocher's excellent summary of everything you need to know about CIPA. Bob Bocher is a Technology Consultant at Wisconsin Dept. of Public Instruction.
libraryfiltering.org.  Maintained by Lori Bowen Ayre, this website provides a matrix of filters available for libraries including contact information, pricing, and product features. Visitors can select products and features to compare side-by-side.