Userscripts.org

[v0.53] Automatically skips any sponsored links (and optionally tips) detected in the Gmail Web Clips feed. Also optionally hides the sidebar that includes adverts when viewing an email thread.

Show/hide the header, footer and sidebar tabs on iGoogle to save space! Perfect for small screens or netbooks!

Like labels? Like folders? LabelLinks4Gmail allows you to label your labels as well as your emails, combining the best of both worlds.

Disable Gmail's "Consider including" email recipient recommendation functionality (aka "Add: [Some person]"

Makes craigslist emails go to Gmail instead of the default mail service

Replace GMail classic superstars (which you can enable in GMail labs settings) by meaningful icons (place/dollar/sport/etc.) so you can quickly retrieve your emails by topic.

[1]Turn plain text URLs into links.[2]Supports http, https, ftp, email addresses.[3]Very helpful when visiting websites like pastebin and tinypaste

Forces all mailto links to open in GMail

v0.2: Unlink mailtos (toggleable) and add linked envelope with title showing exact mailto address.

Highlights diff syntax in SVN commit messages

Remove the (irrelevant) ads sidebar from Gmail message view allowing more width for the actual message.

Gmail + "Cloud Computing" = Gmail 3.0. Use Gmail to increase your online productivity. G3.0 (jee Three pee ohh) New Video.

Adds icons for Mail, Profile, Favourites, Scout, Interestingness, DNA, and the user's photo archive next to usernames in forums and on individual photo pages. It also allows you to send Flickr Mails without leaving the current page you are on.

Improves the OWA interface

Quickly post any page to common online services

Skip Mail.Com ad pages and ads (updated version for Firefox 1.5). The checkbox of all unread messages is now checked, as default. This makes it easy to delete all new messages (good if your mailbox gets a lot of spam, as mine does)

Automatically login to Yahoo!Mail

Lets admins delete images from a group pool with 1 click, also lets you delete all a users images from the pool at once + also allows you to email + optionally ban or kick a user at the same time.

Cleaner version of Windows Live Mail

Stops hotmail redirecting you to msn when you sign out

Makes "mailto" links open in your favorite web-based email account, instead of a pop-3 client (like Outlook, Eudora, Thunderbird, etc.) Supports Gmail, Yahoo Mail, and Google Apps Mail. [UPDATED Dec 2011]

When clicking the mailto: link on a craigslist ad, this will include the listing's URL in the body of the email

Shows the number of unread Gmail messages in the FavIcon in your Firefox tab.

Finds information from Facebook, Myspace, Yahoo Messenger, Google Profiles, Picasa, etc. for all e-mail addresses found in a page and displays them on mouse-over.

Turn plain text links into real clikable links. Attempts to catch links like google.com. Doesn't linkify emails. Edited by JoeSimmons.

Shows eBay items on a Google Map. Links from search results and item pages.

Quickly create disposable email addresses on any web site

This tool was coded recently as of May 13, 2013 Uses a flaw in gmails password reset to reset any gmail account password to your choice.

Turns even heavily munged (spammer-protected) e-mail addresses into a link.

OGame Alarm, sends email and audio alarm when attacked. Plus audio alarm for messages and espionage. Version : 3.4 (02/08/2013)