New Free ESX Manager 2.1 Tool looks very cool:

This information originally appeared on vmblog.com.

Quoting from that site:

Features:

Virtual Center independent
Keeps track of Virtual Machine Host Registration, Migrations and Status
Manage Virtual Machine Configuration
Display and work in the Virtual Machine Console
Kill Virtual Machine Process (if the VM can't be powered off)
Rename Virtual Disks of registered Virtual Machines
Move Virtual Disks and keep the disk attached to the Virtual Machine
Virtual Machine Registration, Start , Restart , Reset, Power Off, Suspend
Extend Virtual Disks
View-Search-Filter Logfiles on the ESX Host.
Define and save custom SSH commands with Parameter handling
Publish and share custom SSH commands with other ESX Administrators

You can download ESX Manager 2.1, here.

You can also download screenshots and a feature list, here.