gmail

Ever wanted to upload files using AJAX like in GMAIL

Add SSL, S/MIME and Gmail support to your applications which use MailBee ActiveX

Access your GMail address book from your desktop

GPhotospace leverages Gmail for online photo storage.

Blue Frog Firefox add-on fights spam in your Gmail, Hotmail and Yahoo mailbox.

allows you to easily attach files to new messages in Gmail or Google Apps Mail.

NetJaxer integrates web 2.0 apps like Gmail and Meebo into Windows

One click backup of any file to your gmail account.

Easily migrates your contacts from Outlook, Gmail and Yahoo! to Opera browser.