Feed Hacks: FeedShake and Feedcatch

Do you want a way to merge or aggregate multiple feeds into one master feed? Do you want to filter a feed or set of feeds and scan for entries that either contain (or don’t contain) a particular item? Then FeedShake is for you. Do you want to make sure you don’t miss any items published to an active feed? Then feedcatch is for you. Do you want to know why the heck either of those things is useful? Then this blog post is for you.