VirtualBox

Virtual runs on Windows, Linux, Macintosh and OpenSolaris and allow you to host other operating systems.
Download

Virtual Floppy Drive

You can mount a floppy image file as a virtual floppy drive and directly access the contents -- view, edit, rename, delete or create files on a virtual floppy, format a virtual floppy, launch a program on a virtual floppy... almost anything you can do with a real floppy.
 
Download

VHD Resizer

VhdResizer (formally VHDExpander) will resize Microsoft's VHD files and will also convert between Fixed and Dynamic file types. This is a sector by sector copy operation from one size/type to the other and the source file remains unaltered.
Download

Veem VM Monitor for VMware Infrastructure

A post-installation script for ESX Server that checks service console configuration, the TCP and DNS settings, and checks which scheduled services failed to launch. It also checks the NTP settings (including firewall) and shows you the time difference between the public NTP server and the host.
Download

Veeam FastSCP for VMware

Veeam FastSCP is the de facto standard for ESX file management. FastSCP allows users to copy files from ESX to Windows, Windows to ESX or ESX to ESX - vSphere ready.
 
Download

Tripwire ConfigCheck

Tripwire ConfigCheck is a free utility that rapidly assesses the security of VMware ESX 3.0 and 3.5 hypervisor configurations compared to the VMware Infrastructure 3 Security Hardening guidelines.
Download

Trilead VM Explorer

Trilead VM Explorer is a management tool that eases management, backup and disaster recovery tasks in your VMware ESX Server environment.
 
Download

Spiceworks Virtualization Management

Spiceworks, is a totally free virtualization management too. capabilities. Design mainly for SMBs running VMware products, Spiceworks 4.6 adds network mapping for networks with Cisco WAPs, the ability to remotely kill processes, default installation of the allegedly popular Intel-sponsored Power Management feature, and integrated product search for CDW from within the application.
Download

SolarWinds VM Console

VM Console is one of two virtualization management tools from Solarwinds, it is designed to bounce (shutdown and restart) and track virtual machines (VM) from the convenience of a real-time, desktop dashboard. In less time than it takes to request VMware(R) vCenter(TM) access or locate login credentials, IT professionals can bring a hung, frozen, or otherwise unresponsive virtual machine back to life.
download (require registration)

RVTools

RVTools is a small .NET 2.0 application which uses the VI SDK to display information about your virtual machines.
Download