Pageslide is a jQuery plugin that slides the entire page aside to reveal secondary interaction or additional content.

Screenpresso is a free screen capture tool that automatically saves a history of the last 100 screenshots.

Create a Facebook style footer using jQuery.

Fireshot is a useful add-on for Firefox that allows you to quickly screen capture any web page and insert text and graphical annotations.

Create multiple column dropdown menus using jQuery.

Mockflow is a free online tool that allows you to create interactive UI wireframes online.  Share your mockups and collect feedback from clients and users.

Compress and optimize your png, gif and jpeg files dramatically without loss using this online tool.

DIY prototype kit from Kongi includes 3 sheets of common UI elements for your next project.

GetSimple is an easy to learn, open source CMS that uses XML for storing data.

This lightbox clone supports common media types including PDF.