This is one of the coolest Firefox extension which allows you to search for images, files and videos and organizes them pretty well. You can call it a Search Engine for your Gmail Inbox. It organizes all your files by types and displays at top so that if you want to find it its right there.

Picture Dashboard in Gmail

Features of Xoopit:

• Indexes the files withing your mails and show you on dashboard kind of feature.
• You can search and share with friends there with inline facility of sending quick mails instead of sending mails through long 3 steps process.
• Find quickly what you shared and talked in recent conversation with the smart box you get when you open a conversation email. Files shared by each and Recent mails from them. This beats out any thing because if you are on a call with any body regarding that mail you can find anything so damn easy.

Track Conversation Details According to users

Indepth File Search In Gmail

File Search in Gmail

Sorting the attachments according to type of files

File Sort in Gmail

Quickly Share files from Inline Send option

Share Attachments quickly in Gmail

Image search and share in Gmail

Image Search in Gmail

Some of the things you should know :

• Xoopit uses Gmail Account for Authentication.
• It will ask you for password when you link your account with Xoopit account.
• They got Best Overall Award at Yahoo Open hack 2008
• They even have a Firefox extensions which should have been check by Mozilla before approval.

Resources: Xoopit | Xoopit Gmail Firefox Extension | Xoopit Blog