Experts' favorite freeware (Security)
Nmap, MBSA etc. More...

Driver Cleaner
"...is a program which helps you to re
move parts of drivers that are left after uninstalling the old drivers. The program is for ATI, nVidia, Creative, Realtek, SIS, 3Dfx, S3 and more drivers." More...

DevCon
"Microsoft has a command-line tool called DevCon.exe that you can use to enable, disable, restart, update, remove and query devices or groups of devices. Wrap that up with the WScript.Shell object and you have something you can really script with." More...

Comptechdoc.org
Good refresher on DHCP (etc.) More...

MakeMeAdmin

Sometimes "Run As" doesn't cut it.

Aaron Margosis' "Non-Admin blog" has details on MakeMeAdmin ("temporary admin for your
Limited User account").

More on reduced privileges at searchwindowssecurity. More...

Freeware tool logs file system events

XTWare has created a free service called FileNotify that traps events on specific directories and performs an action when anything is changed or modified.

FileNotify is a lightweight program: It's a single executable that runs as a system service. There is, however, no installer -- it needs to be registered by hand, but it is easy enough to remove as well. Once set up, you can create a list of directories (with a supplied editor application) that watches for any of the following actions: file creation or modification, deleting files, modifying attributes or names (including long filenames) and changing security tokens. You can use any of these actions to trigger a command-line action, such as a batch file or an .EXE.

The program logs its actions to a text file that, by default, is FileNotify.Log (located in the directory that FileNotify itself is running in).
The program also checks directories recursively -- you can point it at a top-level directory and ask it to watch all files or folders under that directory.

FileNotify cannot monitor activity on a single file, but you can work around this by using a batch file with an input parameter (i.e., mybatchfile.bat %1) as the on-change action. The first line of the batch file can filter for a specific file like this:

If "%1"=="filename.fil" goto myaction

More...

Record Internet Radio
Save to mp3 or wav. Record streaming audio from the Internet, microphone, or any other source. More...

DNS Backups Without the Baggage
"This command would back up the contents of the default DNS folder to the "D:\backups\dns" folder:
xcopy %systemroot%\system32\dns d:\backups\dns /y
Unfortunately, the process isn’t as simple for Active Directory-integrated DNS zones.."
...you need to use DNSCMD instead. More...

Microsoft Security Bulletin Search.
Great resource for tracking down bulletns. More...

Terminal Server commands
From MS and from dev.remotenetworktechnology.com

Locking Down Windows Server 2003 Terminal Server Sessions
Mandatory reading! More...