Feedly, Flipboard, Inoreader, Reeder , FreshRSS, NetNewsWire, QuiteRSS, Tiny Tiny RSS, Fluent Reader, NewsBlur, Feedbro, Feeder RSS feed reader, NewsBreak, RSSMore, SlickReader, Goodbits, Readings, Nooshub, Rivered, WebsUp Trends, FeedSquares, Snarfer are some alternatives to FeedDemon.