Feedburner

http://www.feedburner.com/fb/a/home

Feedburner lets you create a page where users can easily subscribe to your blog with a number of different RSS readers. It will also keep track of statistics for you - like how many folks have subscribed to your blog. Check out my feedburner page by clicking on the link over to the right under "Subscribe to this blog!"

Attensa RSS reader for Outlook

http://www.attensa.com/products/outlook/

This company has made an RSS reader that will integrate right into your Outlook client. It's pretty easy to download and set up and is perfect for people like me who have Outlook open all day long.

BlogLines.com

http://www.bloglines.com

Bloglines.com is a site where you can view and manage your RSS blog feeds in one central online location. You can search for different blogs, get recomendations based on your blogs, save individual posts to a clippings file and even create your own blog there and save other people's blog posts to it easily. If you're a blogger, you can get a bloglines subscribe button and if you're a browser, you can easily get a bookmarklet to easily subscribe to any blog you come across.