All kind of pixel art images, avatars, and animated gifs.

You can select an icon (or upload it) and then fully customize it via this generator.

Fantasy and space travel posters.

"The goal of this project is to offer a consolidated library of icons used in various libraries, window makers, themes and other applications. Over 10,000 unique icons in svg, png, xpm, ico, and icns formats. See homepage for details."

"The National Collection of Aerial Photography is one of the largest collections of aerial imagery in the world, containing tens of millions of images featuring historic events and places around the world."

Pics from Walker in South Africa in 2008

Seems to have it themed. Flags, Browsing, etc.

Open source silk icons at famfamfam.com

Nifty looking icons.

A few nice Firefly wallpapers at 1024x768 resolution.

"If you are looking for help making the transition to CSS layout (that's Cascading Style Sheets), you've come to the right place. I am cataloging here as many useful cross-browser CSS layout techniques as I can find, and some that I made up when I was bored last Thursday. All the examples on this site have been reduced to only their essential code, and you will find the source displayed on each page to hopefully make it quick and easy to understand the inner workings of the CSS.