ReadAIR: Unofficial Desktop Version of Google Reader

If no one tells you, you may think that this is an official Google-released AIR application. It can perfectly synchronize with your Google Reader and it also has functions such as search, labels, and adding/deleting subscriptions. Apart from being able to be used offline (without Google Gears support), another advantage it has over Google Reader is that it only loads when you click on the Labels or Tags items. After that, when you click on the article title, the text content will be displayed directly without any further waiting.