CloudCanvas is an HTML-5 based image editing tool that sports some interesting features. You can work with vector and bitmap images, import files in JPG, GIF, and PNG from both online and offline sources, and save in PNG and SVG formats. CloudCanvas integrates with Google Docs so all your files can be saved securely there and imports images from the Open Clip Art Library, Google Images, and Deviant Art.

A list of 20 really useful (and free) websites that teachers will find useful for everything from image editing, file storage, sharing resources, and converting and storing files.

A search engine that allows you to enter your query, then select a credible source to search for that term in. These include JStor, the Library of Congress, Ebscohost, Eric, the Internet Archive, and many more.

50 open source educational apps from a variety of categories that can replace popular commercial software.

A list of free (and largely public domain) audiobooks that you can download. Comprised mostly of classic literature, many of which are featured in school literature courses.