Here are some links and resources about OPML - Outline Processor Markup Language. This page is a companion to The RSS Compendium. It's pretty much just a dumping ground and needs some order. This will happen!

OPML Icon Project - OPML is maturing and needs an identity. Help spread the word about OPMLIcons.com and join the conversation

From Wikipedia - OPML (Outline Processor Markup Language) is an XML format for outlines. Originally developed by Radio UserLand as a native file format for an outliner application, it has since been adopted for other uses, the most common being to exchange lists of RSS feeds between RSS aggregators. The OPML specification defines an outline as a hierarchical, ordered list of arbitrary elements. The specification is fairly open which makes it suitable for many types of list data

FeedShow OPMLBuilder - lets you create an OPML file from a list of RSS url or from the links included in any web page

Grazr - a suite of services and applications to make reading and organizing news, blogs and other information on the Internet more accessible than ever before

OPML 101 screencast - from Alex Barnett

OPML Editor support - This is where you get docs and support for The OPML Editor from Dave Winer

OPML - Web Developer Resource Index

OPML Fan - a blog from Lisa Williams

OPML Generator - from Stephen Downes

OPML Search - Search within 253,978 OPML files contributed by the OPML Community

OPML Support for Firefox - an extension for the Mozilla Firefox Web browser that adds OPML import/export functionality to the Firefox Bookmarks manager. OPML is a file type that is widely used to distribute lists of RSS/newsfeeds. Exporting OPML from Firefox will create a file that contains the set of your Live Bookmarks; importing an OPML file will add a Live Bookmark for each feed listed in the file

OPML Workstation - a web-based integrated service for creating, hosting and publishing OPML files

Opmlmanager - an online webservice that makes maintaining your own opml file very easy. This opml file can be a file that is part of a distributed directory, like the ipodder directory, a subscription list, a reading list, a file you use for taskable.com, etc

OPML Validator Beta - give it the URL of an OPML document, and it checks to see if it conforms to the OPML spec, and the OPML Validation Guidelines - from Dave Winer

opml-dev - OPML developers discuss applications

Optimal - An OPML Browser by Dan MacTough

MonitorThis - subscribe to 22 different search engine feeds at the same time. Enter a search term and click the 'make monitor.opml' button to get a list of rss feeds in OPML format

OPod - The OPML-Pod is an AJAX OPML and RSS viewer widget that you can embed in any web page you like

Plain text to OPML Generator - Paste a list of rss-feed urls into the textarea and submit to convert into an OPML file

RSS-Search & OPML - use this tool to create an opml file containing rss newsfeeds for a search term. You will get several varieties of opml files. This tool is similar to MonitorThis but has more options

Share Your OPML - The purpose of this site is to gather a community of subscription lists, in OPML format, and aggregate them in interesting ways

Taskable - a new kind of RSS and OPML browser built into the Windows taskbar notification area