Google Gears allows you to read RSS feed offline

Google gears is just another google application tool to make you much more faster for web browsing, and also allow all RSS feed readers to read the articles offline, as the Gears will download all RSS feed. Gears is an open source project that enables more powerful web applications, by adding new features to your web browser:

Let web applications interact naturally with your desktop

Store data locally in a fully-searchable database

Run JavaScript in the background to improve performance

 System requirements

* Windows XP/Vista
* Firefox 1.5+ and Internet Explorer 6.0+

* Linux (details)
* Firefox 1.5+
* 32-bit OS (64-bit not supported)

* Mac OS X 10.4+, G4+/Intel CPU
* Firefox 1.5+

* Mac OS X Leopard 10.5.3+ or Tiger 10.4.11+, G4+/Intel CPU
* Safari 3.1.1+

* Windows Mobile 5+ (details)
* Internet Explorer Mobile 4.01+

* Windows Mobile 6 touchscreen devices (details)
* Opera Mobile 9.51 (Presto build 2.1.0+)

* Android 1.0 device or emulator

Gears is available for Windows, Windows Mobile (IE Mobile, Opera Mobile), Mac (Firefox, Safari), Linux and Android.