Google Redesigned is the new Firefox extension that completely redesigns popular Google services. The styles are created by Globex Designs company and the extension is released as a plug 'n play solution for the users to load and manage them easily. Google Redesigned is an Open Source project and I am leading development efforts of the extension.
Extension is supported by most of the Mozilla family browsers but Firefox 3 and Flock 2 is highly recommended to get the best performance. Just install it, restart your browser and point your browser to Gmail and Google Calendar to experience the new look 'n feel.