Feedfry - The easiest way to create an RSS feed from a web page.
Feedity - Create RSS feed for any webpage or podcast. Extract data and turn dynamic websites into spreadsheet or API. Feedity is an online RSS feed generator and podcast feed builder tool. Display feeds on website.
Update Scanner - Update Scanner is a Firefox extension to monitor web pages for updates.
FiveFilters Feed Creator - Create feed from elements (e.g. links) extracted from a given web page
WebSite-Watcher - WebSite-Watcher detects website updates and highlights all changes in the text. WebSite-Watcher monitors web pages, password protected pages, disucssion forums and much more.
Feedio - Feedio helps bloggers manage and grow their email and RSS subscribers.