Filtering your feeds is a nice idea and is something I don’t actually do automatically via software. For instance I use RssReader to track/subscribe to all the RSS feeds I’m interested in. When new feeds come in I simply look at the title and decide there and then if I think it would be useful or interesting.However there is a tool named Feed Rince that enables you to “filter by; keywords, tags, author, site, profanity, and more…”, might be worth a look.

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