Tool to read, parse, merge, and write RSS (and Atom) feeds. GPL

rsstool 1.0.0rc3 has some other functions built-in like text, HTML, or property file output, or templates with custom tags to insert RSS feeds into pages that could be uploaded to a server that supports only static HTML.

RSS 2.0

EVERYTHING 2.0: RSS 2.0: 200+ ways to find, aggregate, read, generate, manage, mix, filter, splice, tag, validate, publish, syndicate, promote, back-up & share feeds

RSS Submissions

The following sites allowing you to submit RSS feeds: "Consider RSS Submit to automate submissions!"