Some software vendors like Vizioncore, Invirtus and Mellanox Technologies have a VMware Community Source co-development contract. Mellanox Technologies is pleased to announce the availability of the InfiniBand adapter support package for VMware ESX 3.5 Beta 2, comprised of VirtualCenter 2 version 2.5 and ESX Server 3 version 3.5. So the next version is VMware® ESX 3.5 instead of ESX 3.1.