The Lightbox Clones Matrix is a list of scripts that do inline popups, ala Lightbox. You can filter by JavaScript frameworks and features.
These are some of the better free icon sets I’ve seen:
Here’s how to have a drop-down menu appear on top of a Flash object:
via Sheriar Designs
All currently available versions of Internet Explorer incorrectly display colors in PNG images. To work around that, instead of setting a background color, you can use create 1×1 pixel image with the color you want, and set it as a repeating background image.
Tomas Bagdanavicius has created a fast, themeable, cross-browser CSS-based Drop-Down Menu Framework that only uses Javascript for IE6.
These commands will return the largest 10 directories on a Linux box.
du -k / | sort -n | tail -20
via peterbe.com
Richard Lord wrote a good article explaining the various ways of handling dates and times with PHP and MySQL.
This will list all the files on a Linux system that were modified in the past 5 days
find /path/to/start/at -mtime -5 -print
Snipplr has a good article on how to find all of the files on a Linux system that contain a specific string.
find /the/path/to/start/at |xargs grep 'the string' -sl
The search will include subfolders.