I think it can help to have such a list, so please post your recommended utilities and links for custom actions. I will start with some of them not mentioned in here before:
dmidecode compiled for windows - for reading the BIOS table, and get a lot of useful information such as owner tag, memory slots, memory type, hardware part numbers (you need psexec to make it work remotely).
USBDeView - great way to connect disconnect USB devices remotely, usefull to identify the drive letter associated with a device (Windows XP is dumb enough to mount a device on a letter assigned to a network drive and this gives you all the control)
Dump EDID - DumpEDID is a small console application that extract the EDID ("Extended display identification data") records from your computer, analyze it, and dump it into the console window. EDID record provide essential information about your monitor: manufacture week/year, monitor manufacturer, monitor model, supported display modes, and so on...
You can also get the EDID records of a remote computer, if you login to this computer with administrator rights.
Nircmd - NirCmd is a small command-line utility that allows you to do some useful tasks without displaying any user interface. By running NirCmd with simple command-line option, you can write and delete values and keys in the Registry, write values into INI file, dial to your internet account or connect to a VPN network, restart windows or shut down the computer, create shortcut to a file, change the created/modified date of a file, change your display settings, turn off your monitor, open the door of your CD-ROM drive, and more...
A lot more of those Nirsoft utilities can be used... some support /remote command, others can be used with psexec - please read the license of each one, since sometimes they say you cannot use them for commercial purposes.
