Reference
I'm planning on compiling some web design notes on this page for my personal reference. It will be slightly different than my links page in that it will contain very specific information, resources, and even bits of code to copy and paste. There is a lot of code and tools that I constantly use when creating sites, and I want to keep it in a handy place. I will be adding to the list.
HTML Menu
Here is the HTML Menu package from PEAR (the PHP Extension and Application Repository). This makes it easier to create and maintain a navigation structure. Configuration is via a multidimensional hash structure.
Google Maps API
This is a good tutorial on basic use of the Google Maps API.
Lightbox 2
Lightbox JS is a simple, unobtrusive script used to overlay images on current pages. It utilizes the Prototype Framework and Scriptaculous Effects Library.
Listmatic
This site has many examples of CSS driven menus in horizontal and vertical layouts.
Rounded Corners
This site has collected dozens of methods from across the web for producing CSS rounded corners. Methods are sortable by whether they use images or Javascript, and if they are liquid or fixed.