Flickr is an image hosting site and one of the best online photo management and sharing applications on the web, currently owned by Yahoo!  Take the tour to find out more.

If you go to http://flickr.comcreativecommons/ , you will be able to search for images that give certain copyright privileges for others to use their content legally. Here is an excellent handout from Creative Commons, for reference purposes.

Use Bulkr to explore Flickr from your desktop and download up to 500 photos at once.  Note that only photos that have a Creative Commons license are available for download in this format.

If you connect Bulkr to your own Flickr account, you can easily browse your own photo collection and download in bulk.