OnePipe , a browser bookmarklet that filter any feed by topic. OnePipe works as filtering feed content of the page you are on, and generate a new feed for you. You can create custom RSS feeds from websites based on a keyword or phrase through a simple bookmarklet.

It’s simple to use, after install the bookmarklet, navigate to any website whose feed you’d like to filter and click the OnePipe button. You’ll be prompted to enter any topic or word after which OnePipe will generate a custom feed that only contains those items that match your keywords. OnePipe will automatically open the filtered feeds in a Grazr window.

OnePipe is a free Firefox bookmarklet; just drag and drop. Drag this hyperlink OnePipe to your bookmarks toolbar. This will cause a button named OnePipe to become available on your toolbar.