Virtuix Omni is a virtual reality interface, an omnidirectional treadmill video game peripheral to maneuver within virtual reality games. The Virtual Omni SDK gives developers the necessary information to fully leverage the interface.
The goal of HeyZap is to be the "YouTube of casual gaming" by giving site publishers a way to embed more than 6000 casual Flash games into their sites with a single embed code. Their business model (more detail from TechCrunch) is to collect revenue from ads within the games using the MochiAds ad platform and share some of that with developers. The publishers using the code don't get revenue, but get increased traffic to their sites.