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
LaTale - LaTale draws heavily from some other 2D side scrolling video games to provide a great fantasy MMORPG world.
Zoho Desk - Industry's first context-aware Helpdesk Software
NosTale - NosTale (The Tale of Nomads of Silver Spirit) is a totally free MMORPG that includes simple (but beautiful) graphics and also lots of class options.
Salesforce Service Cloud - Service Cloud integrates customer service with social networks and provides a self-service customer portal and knowledge base system.
Dungeon Fighter Online - Dungeon Fighter Online is a Free-to-play, Massively Multiplayer Online, Role-playing, Action-Adventure, Hack and Slash, and Fighting video game created and published by Neople.