The new Freebie Images WordPress Plugin provides a nice interface for adding  free stock photos and images to your blog.

Features:

• Image Search
• Advanced Image Search
• Drag and Drop images right into your edit window.
• Easy to install and use.

Licensing:

The images provided by this plugin use the Creative Commons License with a few conditions:

• Attribution – Each image has a small watermark and a caption with a link.
• No Derivative Works – You may not alter, transform, or build upon this work.

From our testing, the plugin appears to work as expected, but does seem to conflict with a few other plugins that enhance the edit window in WordPress.

Give it a try, you just might like it!