One of the main reasons you buy an Android Phone is simple: Google account integration! I mean it's a OS made by Google, so they should make it play nice with their flagship products, right? And they do, for the most part. Excellent G-mail support, good calendar integration, and even built-in programming for Google Voice make for a sweet phone. But one area that still suffers is Google Docs. Sure you can view virtually any document from the web browser, but that assumes you are in an area with a good data connection. And you can't even edit rich-text documents. That's where GDocs comes in.
GDocs is an open-source-ish project that works to fill in the current feature gaps of Google Docs in the mobile browser. It also works on virtually all Android phones (version 1.5 and up), and it addresses the aforementioned problems to a degree. First and foremost, you can edit rich-text Google Documents from the phone now, although you cannot make any rich-text transformations (i.e. Bold, Italics, Underline). Even with the caveats, it's great to finally be able to edit online documents from your phone. At least you can still view the Rich-text format of your document with this program.
The other great feature that I have to mention here is the ability to download, store, and synchronize your documents with your phone. No need to worry about cell reception or a data connection, and any changes can be set up to automatically sync with the "cloud". It's great!
Other listed features include:
A truly excellent addition to your phone until Google gets it act together on this one. A must-have if you regularly utilize Google Docs. Scan the QR code with your phone to go directly to the App in Android Market.