Outlook Web App
Mailbox Filter - Smart Email Spam Filter for Outlook, Yahoo, Msn, Hotmail, AOL and POP3.
WorleyParsons Outlook Webmail Access
UKZN Outlook Webmail Website
CloudSponge provides an interface to easily enable your users to import contacts from a variety of the most popular webmail services including Yahoo, Gmail and Hotmail/MSN as well as popular desktop address books such as Mac Address Book and Outlook.