smupcheck, which stands for Smart Update Checker, checks Web sites for updates automatically, even if they don't offer an RSS feed. It is a very basic tool, and does not offer advanced features such as checking password-protected Web sites, highlighting changes, or filtering results.
ivata groupware is a groupware/intranet portal system based around J2EE standards. It provides an enterprise-ready solution. It is a great tool to enable teams to find contacts in team and private address books, to share documents, to post articles and notes, to comment on articles, to receive notifications via email, to plan meetings and other events in the calendar, and to access email via the Web.