Single-file online malware scanner – http://virusscan.jotti.org/

The retiring DjLizard has shared with me http://virusscan.jotti.org/ – a place to upload individual files less than ten MB in size and have it scanned by nearly 20 antivirus products.

Testing SMTP on Exchange

While the following guide on testing SMTP functionality on Microsoft Exchange Server is specific to MS Exchange, it should work for most SMTP servers, as well:

SUMMARY

This article describes how to telnet to port 25 on a computer that runs Simple Mail Transfer Protocol (SMTP) services to troubleshoot SMTP communication problems. The information in this article, [...]

Street Fighter Boss Character Names

I never knew this, but I happened across the Balrog article on wikipedia and discovered something interesting:
When Street Fighter II was localized in America, Capcom was afraid of a lawsuit from Mike Tyson over a character with his likeness and a similar sounding name (Mike Bison). Additionally, when the designers presented the game to Capcom [...]

Determine Video Card Memory from within Windows

To determine the size of your video card’s memory within windows open a command prompt and type ‘dxdiag’
Microsoft’s description:
The Display tab also lists your device’s available memory and can tell you if your video driver has passed Microsoft’s Windows Hardware Quality Labs (WHQL) testing regimen by checking whether the WHQL Logo’d [...]

Usability.gov

Great resources at usability.gov. I particularly liked the post detailing a study of which navigation style is the most effective. There are a ton more articles I think any web designer would benefit from using. Give them a peep.
Please mention any resources you know of relating to usability! I’ll be sure to check them out.