My Yahoo
My Yahoo is a customizable web page with news, stock quotes, weather, and many other features.
http://my.yahoo.com

Bloglines
A web-based personal news aggregator that can be used in place of a desktop client.
http://www.bloglines.com/

Daily Rotation
A web-based RSS reader which provides headlines from 300+ tech sites.
http://www.dailyrotation.com/

News Scrollers
Service that scrolls data from any RSS feed on a webpage.
http://www.webpasties.com/prod_news_scrollers.html

Feedroll
Web-based reader generates a JavaScript code for syndicating feeds on any Web page.
http://www.feedroll.com/rssviewer/

NewsBox
Offers access to multiple news sources in German and English.
http://news.ohardt.com/

Shortwire.com
View, alert, create, publish and host RSS feeds and blogs with ease.
http://www.shortwire.com/

wURLdBook Research
A web-based personal news aggregator that can be used in place of a desktop client and information aggregator.
http://www.wurldbook.com/

News is Free
Directory of feeds also allows for personalized news pages.
http://www.newsisfree.com/

RSS News Reader
This web-based RSS reader allows you to read news using a browser. It supports RSS 0.91, 0.92 and 1.0.
http://soapclient.com/rss/rss.html

Newsmonkey
Flash based RSS aggregator.
http://www.nuwance.com/newsmonkey/

X Hollywood News Feed
Entertainment related news directory and aggregator.
http://www.xhollywood.com/dir/

Genecast News Service
A server based RSS news and weblog aggregator converting them to Usenet News.
http://www.genecast.com

Web RSS Reader
Free web-based RSS reader with multiple skins.
http://rss.plech.net/

Findory
Personalized news and weblog reader. It learns from the reading patterns and discovers similar RSS feeds.
http://findory.com/

The Daily Read
RSS Reader with nearly 500 predefined RSS feeds in 23 categories.
http://www.thedailyread.com/

SYFACiL virtual desktop
RSS reader along with file manager, bookmark manager, web content catcher. Can be access by web or SMS.
http://www.syfacil.com

Rojo.com
Free aggregator service with the ability to share feeds with others.
http://rojo.com/

Free RSS Feed Reader
RSS reader designed to be used via a third party website.
http://rssfeedreader.com/

RSSinclude
Tool integrates any RSS feed into a website using a small piece of HTML.
http://www.rss-info.com/en_rssinclude.html

Lightstreamer Push RSS Reader
An HTML RSS Reader, based on Lightstreamer technology, that does not require to download applets or application. It streams new headlines to the browser without refreshing the page.
http://app.lightstreamer.com/RSSDemo/

Web Nymph
Free online aggregator listing headlines from sites in numerous categories; weblogs, news, politics, and music.
http://webnymph.com/

Gregarius
RSS/RDF/Atom feed aggregator, designed to run on a web server, allowing access to feeds from a web browser.
http://gregarius.net/

LiteFeeds
Web-based RSS reader and also a custom mobile RSS reader for any Java Phone/SmartPhone, Blackberry, Palm or PocketPC which synchronizes with online subscriptions.
http://www.litefeeds.com/

MetaRSS
Online reader with a directory and tools for creating feeds.
http://metarss.com/

Aggregato
A web-based RSS feed aggregator organized with tags.
http://www.aggregato.com/

Netvibes
Personal news aggregator with RSS and Atom support. Comes with a set of predefined news feeds.
http://www.netvibes.com/

KickRSS
A service that takes multiple RSS or Atom feeds, combines them, and displays them as a single RSS feed or a webpage at an easy to remember URL.
http://www.kickrss.com/

FeedOnSite
Tool that helps websites to publish headlines from RSS feeds as normal HTML on their website.
http://www.feedonsite.com/index_en.php

Google Reader
Free feed reader stores manual or imported reading lists.
http://www.google.com/reader/

DogWalker
An extension to Adam Simpson's RawDog (web based aggregator python script). DogWalker is a script that periodically runs RawDog on webmaster's home PC and ftps the result to the site.
http://rawfish7.tripod.com/

Urchin RSS Aggregator
Perl, web based, customisable, RSS aggregator and filter that consumes RSS, Atom and screen-scraped HTML and produces RSS or XSLT-transformed output.
http://urchin.sourceforge.net/

Newsburst
Web-based RSS reader from CNET News.com. Supports all versions of RSS and Atom.
http://www.newsburst.com/

FeedFeeds
A customizable feed reader service.
http://www.feedfeeds.com/

YourLiveWire
An AJAX RSS reader which displays RSS deeds in draggable auto-arranging windows which updates as feeds are updated.
http://www.yourlivewire.net/

FeedAgg.com
Free RSS/XML web based feed aggregator, feed rating, and social feed tagging site.
http://www.feedagg.com/

BusterNews.com
A free web-based RSS aggregator. [requires Internet Explorer]
http://busternews.no-ip.org:8095/

Gritwire
A flash-based feed reader that can organize feeds into folders, read and save content, or rate feeds and feed items.
http://my.gritwire.com/

RSS2GIF
A service that will convert any RSS Feed into an automatically updated GIF image.
http://www.navi-gez.de/rss2gif/

Journster
Details on this online RSS/ATOM aggregator.
http://www.journster.com/