Gmail has proven to be one of the best email services. The following are tools, tips and tricks that can increase the functionality of your Gmail. It includes Firefox extensions, scripts, desktop tools.

Better Gmail – Compilation of some of the best Greasemonkey scripts for Gmail compiled as a Firefox add-on.

Cookie Swap – Manage multiple Gmail accounts at once with this Firefox add-on.

GPhotospace is the fastest way to share photos online. This free photo album builder works elegantly with Firefox and Gmail.

Remember The Milk  for Gmail is a Firefox extension that allows you to manage your tasks in Gmail (complete, postpone, and edit tasks), add new tasks (and connect them with your emails, contacts, and Google Calendar events), automatically add tasks for starred messages or specific labels, and much more!

DragDropUpload – Drop files into attachment boxes easily.

Email This – Emails the current title, highlighted text and link of the active page using email applications like Gmail.

Gmail Manager – Manage multiple Gmail accounts and display new mail notifications.

Gmail Notifier – Will monitor a single or multiple Gmail accounts from within Firefox. Displays information such as unread email messages in the status bar.

Integrated Gmail – Makes it possible to display other Google services like Google Calendar or Reader directly in Gmail.

Gmail Assistant – A notifier for multiple Gmail accounts with many options.

Gmail Backup – Explains how to backup all mails of a Gmail account locally.

Gmail FS (Linux) – Add Gmail as a hard drive in the Linux operating system.

Gmail Mobile – Mobile application for Gmail.

Gmail Todo – Quickly Add ToDo’s to the Gmail account.

Gspace– This extension allows you to use your Gmail Space (7.3 GB and growing) for file storage. It acts as an online drive, so you can upload files from your hard drive and access them from every Internet capable system.