Mattermark in Salesforce AppExchange - Automatically enrich leads in Salesforce with Mattermark
Hunter - Find all the email addresses related to a domain
Proof - Website conversion rate optimization and visitor monitoring
Mail Dump - Powerful Extensions for email addresses extracting, verifying and finding
Drift + Salesforce Integration - Create and track leads from Drift in Salesforce
Snov.io - More leads. More sales. More revenue.