NeverBounce - Real-time email verification and cleaning to ensure emails never bounce.
Freshdesk - Freshdesk is a cloud-based customer support software that lets you support customers through traditional channels like phone and email, social channels like Facebook and Twitter, and your own branded community
Email List Verify - The Fastest Way to Improve Email List Deliverability and ROI
Zoho Desk - Industry's first context-aware Helpdesk Software
ZeroBounce - Removes invalid emails from your list to prevent email bounces from ruining your deliverability.
Salesforce Service Cloud - Service Cloud integrates customer service with social networks and provides a self-service customer portal and knowledge base system.