Association of Credit and Collections Professionals
http://www.acainternational.org/

International Credit & Collections Benchmarking Association
http://www.iccba.org/

Credit and Collections World – an online resource for commercial and consumer credit professionals
http://www.collectionsworld.com/

DefaultRisk.com - credit risk modeling resource.
http://defaultrisk.com

Credit Today – publication for credit and collections professionals
http://www.credittoday.net/