It is very Useful Tool for ESX and vCenter.
RVTools is a windows .NET 2.0 application which uses the VI SDK to display information about your virtual machines and ESX hosts. Interacting with VirtualCenter 2.5, ESX Server 3.5, ESX Server 3i, ESX Server 4i, VirtualCenter 4.0, ESX Server 4.0, VirtualCenter 4.1, ESX Server 4.1, VirtualCenter 5.0, VirtualCenter Appliance, ESX Server 5, VirtualCenter 5.1 and ESX Server 5.1. RVTools is able to list information about VMs, CPU, Memory, Disks, Partitions, Network, Floppy drives, CD drives, Snapshots, VMware tools, Resource pools, ESX hosts, HBAs, Nics, Switches, Ports, Distributed Switches, Distributed Ports, Service consoles, VM Kernels, Datastores and health checks. With RVTools you can disconnect the cd-rom or floppy drives from the virtual machines and RVTools is able to update the VMware Tools installed inside each virtual machine to the latest version.
This application supports ESX Server 3.5, VirtualCenter 2.5, ESX Server 3i, ESX Server 4i, VirtualCenter 4.0, ESX 4.0, VirtualCenter 4.1, ESX 4.1, VirtualCenter 5.0, VirtualCenter Appliance, ESX 5, VirtualCenter 5.1 and ESX 5.1.