http://www.firefox.com because I read a lot of news-feeds on a "daily basis":http://duenos.net/alex, and Safari's integrated reader kicks butt. Packed full of "features":http://www.opencommunity.co.uk/vienna_features.php, Vienna Reader is a freeware feed reader that replaces and multiplies the functionality of any other RSS program, including Safari. It has a great Mail-like interface that is intuitive and just simple enough to use without being ungainly. It's also very customizable, although I ended up going back to the default settings a few days into using the program, and the built-in browser is nice for when you don't really want to open up Firefox to look at a link. If you get any of your news from RSS or ATOM feeds, you need to try Vienna Reader. If you don't, you should start by "downloading":http://www.opencommunity.co.uk/vienna2.php Vienna and "subscribing":http://feeds.feedburner.com/Duenosnet to Duenos.net. Previous _Killer Apps for Mac_: "Adium":http://duenos.net/article/129/killer-apps-for-mac-adium, "Sidenote":http://duenos.net/article/111/killer-apps-for-mac-sidenote, "Darwiin Remote":http://duenos.net/article/193/KillerAppsforMacDarwiinRemote, "Mac Pilot":http://duenos.net/article/174/KillerAppsforMacMacPilot, "Disk Inventory X":http://duenos.net/article/163/KillerAppsforMacDiskInventoryX, "Tangerine":http://duenos.net/article/150/KillerAppsforMacTangerine, and "SizzlingKeys":http://duenos.net/article/119/killer-apps-for-mac-sizzlingkeys.