PingtheSemanticWeb.com is a web service archiving the location of recently created/updated RDF documents on the Web. If one of those documents is created or updated, its author can notify PTSW that the document has been created or updated by pinging the service with the URL of the document.
This service analyzes the content of web pages and RSS feeds and sends alerts if there are any differences. The wide range of options allows users to configure their watch-filters in an appropriate way to track only desired information. A detailed reporting system keeps information from every check and gives real-time picture for every change on the monitored resource. The service is free of charge and can be used without installing any software.
Searching for feeds by keywords can often be an unsuccesful process because of the broad vocabulary in use. Instead of a single keyword search, Feed Meme offers a multi-word macro search.
BlogSieve is a free web-based tool that creates new feeds by filtering, merging and sorting existing feeds. The BlogSieve engine accepts virtually every (valid) feed format, processed results are then exported into any feed format you choose.
Eqentia is a multi-purpose semantic publishing platform for knowledge tracking, competitive intelligence, media monitoring, SEO enrichment, thought leadership or any custom content.