16 free and open source downloads for Windows
: A free e-mail client developed overseas by Chinese Tencent.
: Easily scan emails and finds attachments to be saved.
: A small and fast email client with Bayesian spam control.
: Store, export, archive and backup emails with offline searching and easy access to stored emails.
: Email notification system which pops up notifications from the tray.
: Email client with SMTP, POP3, Gmail and Yahoo Mail support.
Easy2Sync for Outlook
: Easy2Sync for Outlook synchronizes Microsoft Outlook mails, contacts, tasks, etc.
: eM Client is a fast replacement for MS Outlook, Thunderbird or Outlook Express.
: Synchronize your Outlook client with a Gmail account.
: IncrediMail 2 is a powerful, easy to use, feature-rich and fun email program.
: A fast and free email client supporting multiple users with SMTP, IMAP and POP3 accounts.
: An email client supporting user-to-user encryption, spam control, plugins and powerful searching.
: A fast and intuitive email client application which supports offline viewing and Gmail, Hotmail, Yahoo and AOL accounts.
Windows Live Mail
: Access Windows Live mail from your desktop running Windows.
: Store and share content from your email account.
Email Finder Pro
Search and Replace Email Tool.