Duplicate Check - Start creating data happiness. Find, merge and prevent duplicate records in your Salesforce Organization.
CiviCRM - A Constituent relationship management for the Civic Sector
CRMfusion - CRMfusion is a suite of data quality and data integration tools that integrate well with Salesforce.
Odoo CRM - Open Source CRM
ZaapIT - Mass Merge, auto merge, duplicates cleanup, bulk edit, bulk update, bulk delete , mass lead convert
WORKetc CRM - All-in-one business management system. CRM + Social + Projects + Billing