Category - 3. Gamification Engine

Hooptap's Gamification Engine.
Mambo.IO is an on-premise, open-source gamification platform.
Playlyfe is a gamification platform that enables anyone to easily and quickly create a gamified solution.
BadgeOS™ is a free plugin to WordPress that lets you easily create achievements and issue sharable badges as your users succeed.
Funifier Studio makes it easy for administrators to create, evaluate and go live with their own Gamification strategy.