Windows/Mac/Linux (Adobe AIR): Free, open source application ReadAir syncs your Google Reader feeds to the comfort of your desktop. ReadAir—whose three-pane interface looks and feels much more like a desktop newsreader than Reader—also retains a lot of Google Reader features, like starring items and adding and tagging feeds. The biggest missing feature in ReadAir is its lack of keyboard shortcuts; you won’t be j/k-ing your way through your unread items in ReadAir the same way you can on the web—at least not in this version. That said, the app’s to-do list includes offline mode and keyboard shortcuts, so if you’d prefer Reader had that desktop look and feel plus a killer web interface when you need it, ReadAir is a great option. ReadAir is free, all platforms, requires Adobe AIR. Thanks StevieB!