NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
Cloudingo - Cloudingo - a cloud-based SaaS, connects to Salesforce and allows system administrators to scan their entire database for similar or duplicate records.
Email Verifier - Email verifier app lets you verify email.
CRMfusion - CRMfusion is a suite of data quality and data integration tools that integrate well with Salesforce.
Email List Verify - The Fastest Way to Improve Email List Deliverability and ROI
ZaapIT - Mass Merge, auto merge, duplicates cleanup, bulk edit, bulk update, bulk delete , mass lead convert