Free pop3 mail monitor
Another gem of software found on SourceForge. GPL. For Windows. It will monitor email boxes and will play a sound or produce a nice (and persistent) notification on the screen. It\'s much more noticeable than the little envelope in the tray that Outlook provides.
http://poptray.sourceforge.net/index.php
Non-Free, but cheap, email client for Windows. Good compatibity w/webmail is claimed.
http://www.emclient.com/server
Eudora went Open Source in 2018-05. This modernization OSS fork: https://sourceforge.net/projects/hermesmail/