XML and RSS

gAjax RSS Feeds Displayer (hosted) FF1+ IE5+ Opera8+
This script takes advantage of Google's Ajax Feed API to let you easily display RSS feeds on your site without hosting anything on your own servers. Display results from multiple feeds intermixed, sort them in a variety of ways, specify which components of each RSS entry to display, and more.

gAjax RSS Ticker (hosted) FF1+ IE5+ Opera8+
Powered using the gAjax RSS Displayer engine above, this script creates a RSS ticker capable of displaying multiple feed sources. You can sort the entries, specify how many RSS entries to show at once, and more. And all this without having to install anything on your site. Cool!

gAjax RSS Pausing Scroller (hosted) FF1+ IE5+ Opera8+
Powered using the gAjax RSS Displayer engine above, this script creates a pausing RSS scroller capable of displaying multiple feed sources. You can sort the entries, specify how many RSS entries to show at once, and more. And all this without having to install anything on your site.

SAG Content Scroller (hosted) FF1+ IE6+ Opera8+
SAG Scroller takes a regular UL list and scrolls it upwards, one LI at a time and pausing in between. It lets you showcase content that can either be defined inline on the page, inside an external file and fetched via Ajax, or sourced from RSS feeds. The scroller can be set to either auto scroll, or on user demand via the navigation panel as part of its interface.
Also Listed in Ajax and Iframe, Scrollers

RSS Display Boxes FF1+ IE5+ Opera8+
Using Ajax, this script makes it easy to display RSS feeds from other sites inside DIV containers. Each RSS box can be independently tailored, from the RSS feed to fetch, how many items to show (and whether to paginate them), to what portions of each entry (just the "title", or "title" plus "description" etc) to display.
Also Listed in Ajax and Iframe

Local RSS/ XML Feed Displayer FF1+ IE8+ Opera8+
Local RSS Feeds Displayer takes one or more local RSS/ XML files on your own server and displays their contents on your site in a single output. You can customize the output in a variety of ways, from sorting it, arranging the order of the fields within each entry, to stripping the HTML/ truncating the length of long fields such as the "description".

Ajax XML ticker (txt file) FF1+ IE5+ Opera8+
This is an Ajax enhanced ticker script that lets you use a text file as the contents of the ticker to show! Easily define your messages, which support rich HTML, all inside this external text file. Now there's no more excuse to not update the contents of your ticker more often!
Also Listed in Scrollers & Ajax and Iframe

DOM XML ticker FF1+ IE5+
By combining DHTML with XML, this ticker script makes updating its contents a breeze, through an external XML file. Just open the file, and enter the desired messages to show. Plain text and links (with targeting) are supported, and script is functional in both IE5+ and Firefox.
Also Listed in Scrollers

Pausing RSS Scroller FF1+ IE5+ Opera8+
Pausing RSS scroller is an innovative scroller that combines PHP and external JavaScript to let you show any RSS feed on your site- and beyond! By bypassing Ajax in favour of dynamically loaded JavaScript, the scroller can be included on any site, enabling you to syndicate your feed for other sites to display, just by allowing webmasters to cut and paste the frontend portion of this script.
Also Listed in Scrollers & Ajax and Iframe

RSS Ticker (Ajax invocation) FF1+ IE5+ Opera8+
This powerful RSS ticker script lets you easily display any RSS content on your site in a ticker fashion! This script uses a simple PHP based RSS parser called LastRSS to retrieve an RSS feed, then Ajax and DHTML to display the feed dynamically and with flare.
Also Listed in Scrollers & Ajax and Iframe