Qwiki

Qwiki is a visual search enine that works like Wikipedia. It gathers information for millions of topics pulling together an interactive image and text presentation on whatever topic you choose to search for.

Earth-Touch Nature Videos to Download

Earth-touch.com is a site that has a wonderful collection of incredible video footage of the natural world including animals and the environment. You can download the videos in standard definition or HD, or stream it directly from their site.

Tag Galaxy

Tag Galaxy

Tag Galaxy is a visually cool site that allows you to explore relationships between words. Type in a word and the screen becomes a floating model of a galaxy with the original word at the center and words that are similar or associated with it orbiting around it.
If you click on the word in the center, a globe populates with pictures from Flickr that are tagged with that word. If you click on one of the other words that are orbiting around the original search word, you will get a combination of the terms and pictures related to both, as well as a new galaxy model with further choices of related terms. The more orbiting words you choose, the more specific your pictures will be.

Tag Galaxy is great way to visualize word and idea relationships.

picture.of.a - free picture search engine

picture.of.a is a is a search engine designed to find free pictures. There are several categories that you can look there or you can do a search for a specific word. While there are large amount of free pictures on the site, you are limited to what categories are there. For example, I searched for the term "tree" and was redirected to pictures for "plants".