One of the most useful Powertoys I've installed on my Internet
Explorer (for the few times I'm using it 
) is certainly the RSSAutoDiscovery
Toolbar, a little add-on that adds RSS auto-discovery support
to Internet Explorer (just like the same feature that is built-in with
Firefox).
The toolbar detects HTML link elements that specify the location of RSS
feeds, provides an indicator when feeds are discovered and enables the
feeds to be viewed in Internet Explorer.
Once detected, the links can be copied, dragged and dropped to another
application or viewed within the current Internet Explorer session.
What is new is that the add-on now has the ability to
support ATOM 0.3 feeds and now is really complete (it
supports also RSS 0.9x, 1.0 & 2.0). Recommended if
you're an IE user and a RSS lovers! 