The Informa library provides a convenient Java API for handling news channels and metadata about them. Different syntax formats (RSS 0.91, 1.0, 2.0 and Atom 0.3, 1.0) for feeds are supported. Also support for channel information descriptions (OPML) avail
phpSitemapNG is a free Google Sitemaps generator written in PHP, but also generates RSS-based, txt-based and HTML-based sitemap files. It will spider your website and can also index the filesystem.