GMAIL Skins
What it is
Gmail Skins is an extension that tries to make your Gmail experiance a little better.
What it does
Click an item for a screenshot.
Change the colour of your inbox - Choose colours from green to dark green! View weather, google calendar and news headlines along side your emails - Any Google IG module can be added. Insert images from your Picasa web album in to your emails - Google lets you send emails from Picasa, but not send photos from Gmail. Insert smileys, images, tables and html in to your emails Change the attachment paperclip to an icon indicating the type of attachment - The attachment icon reflects the filetype of the attachment. Complete integration with Gmail - Settings are changed from the Gmail settings page and they are stored on your account in a special Gmail label meaning your settings are persistent from computer to computer. Make the navigation (Inbox, Starred, Sent Mail, etc) horizontal Fix the navigation in place so that you don't have to scroll to the top of the page to see it Zebra stripes on mailbox - pretty! Hide various page elements (invite panel, page footer, your email address from the top right of inbox - may be useful for public computers)
Where it is
Download firefox if you would like to use this extension:Then the firefox extension can be downloaded below:
Here (via addons.mozilla.org (via disclaimer))