There are many free tools and utilities available on the internet that allow you to configure and manage your VMware environment. This page is not a full listing but it helps you getting started with finding the tools and utilities that might be useful for your environment.
Flings by VMware Labs
The engineers at VMware work on tons of pet projects in their spare time, and are always looking to get feedback on their projects (or “flings”). Why flings? A fling is a short-term thing, not a serious relationship but a fun one. Likewise, the tools that are offered at the VMware Labs web site are intended to be played with and explored. None of them are guaranteed to become part of any future VMware product offering and there is no support for them. They are, however, totally free for you to download and play around with them!
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 vCenter, ESX and ESXi. 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. (RVTools homepage)
CPU Host Info
This utility will allow you to read the CPU information from your ESX Servers by querying your vCenter server. It will show all features available for your CPUs and if they are compatible to vMotion virtual machines and if Fault Tolerance is supported. (download from run-virtual.com)
Or use this great PowerShell script that also displays all CPU-features that are supported on your hosts: www.ntpro.nl/blog/archives/1389-CPUID-System-Information.html