6.1. Feedscrub filters your feeds based on your preferences. Subscribe to all your favorite feeds, then tell Feedscrub which posts you do and don't like. Feedscrub will learn your preferences and begin filtering out posts that don't interest you.
7. Bayesian Feed Filter
8. Blogsieve
9. FilterMyFeed
10. BlastaCasta
11. FeedRinse
12. Yahoo Pipes
13. AideRSS
13.1. not a precise filter, like FeedRinse, but instead filters posts using social interactions to determine what the crowd has deemed a blog’s best content
13.2. One of the great things about AideRSS, is that its underlying filtering algorithm has been released as a standalone API, meaning that enterprising developers can add social RSS feed filtering to their apps easily
