aggreg8 [1] is a Mozilla plug-in. The RSS feed reader runs in a separate window or in a Mozilla tab. It is a real light-weight tool, offering all needed to show, what RSS is good for.
Update: Forgot to add the \”via\” [2] 😉
[1] http://www.aggreg8.net/Documentation/installationguide.php
[2] http://www.lights.com/weblogs/rss.html