MailPop 2.0 (by Ed Lau & Renaud Ternynck)
MailPop is a Dashboard widget that not only announces new mail but lets you see snippets of all the unread messages in your inbox.

MailPop 2.0 (by Ed Lau & Renaud Ternynck)
MailPop is a Dashboard widget that not only announces new mail but lets you see snippets of all the unread messages in your inbox.

GmailStatus 1.0.7 (by Carsten Guenther)
GmailStatus displays the number of unread messages in your Gmail inbox in the OS X menubar.

Gmail Inbox 2.1 (by Brett Buddin)
Displays the number of unread emails in your Gmail inbox.

Gmail 1.0 (by Google)
Gmail Widget displays Your Gmail inbox at a glance.

Gmail Notifier 1.8.2 (by Google)
The Gmail Notifier is an application that alerts you when you have new Gmail messages.

gotMailG 2.0 (by holetse)
gotMailG is a simple widget that reports the number of unread messages in your Gmail account without any fancy graphics or using much Dashboard space.

Mail Checker 2.0 (by Scue)
Mail Checker is a very simple dashboard widget that displays the status of your Gmail or Yahoo! account.

GPeek 1.0 (by ThreeTree)
Using the new GMail atom feed, GPeek is able to display all the pertinent information relating to every piece of new mail in your inbox: Subject, sender, time and the first few lines of the email.

QuickMail 0.8 (by Scue)
Now you can quickly send emails from your Gmail, Yahoo! or other mail account!

On the back of the widget you can enter your account details - this can be as simple as selecting, say, Gmail and then entering your Gmail address and Gmail password.

Unread Count 2.0 (by Computing Human)
Unread Count Widget displays the number of unread email messages you have in Mail.

gotMailG 2.0 (by holetse)
gotMailG is a simple widget that reports the number of unread messages in your Gmail account without any fancy graphics or using much Dashboard space.

Widget Mail 1.6 (by haym37)
Do you want to send a quick message to someone? Know that they check their Dashboard often? Don’t want to wait for them to check their email? Then Widget Mail is for you! You can use it to ask someone in your office a quick question or to ask your friend to have lunch with you.

Buddy Status 1.4u (by Adam’s Universe)
Want to stalk your friends, but hate having a buddy list open?

Buddy Status is a simple Dashboard widget for Mac OS X v10.

Send SMS Widget 2.0 (by Alco Blom Software)
How do you send an SMS? Are you using the T9 input method? Are you also wondering why you are using these small keys with numbers on it to enter text while you have your Mac keyboard in front of you? Then the Send SMS widget is for you.

FTP Drop 1.0 (by Chris O'Brien & Jasper Hauser)
FTP Drop is the quickest and most convenient way to upload files to your favorite FTP servers and directories.