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
Froged - One click solution providing easy-to-use marketing, sales and support services to turn website visitors into happy customers.
Zoho Desk - Industry's first context-aware Helpdesk Software
Keep Your Friends Close - A free e-book about maximizing Customer Lifetime Value
Salesforce Service Cloud - Service Cloud integrates customer service with social networks and provides a self-service customer portal and knowledge base system.
ChatWoot - Open-source omnichannel customer engagement platform