BizProspex - BizProspex offers CRM data cleaning solutions.
Oracle Data Quality - Overview of Oracle Enterprise Data Quality
RingLead - RingLead offers a complete end-to-end suite of products to clean, protect, and enhance company and contact information.
TowerData - demographic data on email addresses
WinPure Clean & Match - WinPure Clean & Match is the worlds best data cleansing & data matching software for sophisticated matching, cleansing and deduplication.
PCA Predict - PCA Predict is a customer data cleansing and enrichment solution.