FeedBlendr lets you combine and mix several RSS feeds into one. According to the official website, FeedBlendr is a system that takes the feeds you give it, pulls the individual entries from each of them, attempts to sort them in date order (combined across all feeds) and then provides you with a new, blended feed of all entries.
FeedBlendr:
1. Takes the feeds you give it
2. Pulls the individual entries from each of them
3. Attempts to sort them in date order (combined across all feeds)
4. and then provides you with a new, blended feed of all entries
