Here’s a selected list of useful GWT resources that I’ve found. For a more comprehensive set of links, visit gwtpowered.org.

Getting Started

• Introduction to GWT (developerlife) Really nice tutorial of GWT basic concepts.
• Hands-On Google Web Toolkit – Article demonstrating GWT’s features by developing a mash-up photoviewer.
• Kickstarting Google Web Toolkit on the Client Side by Simon Morris. Walks through three simple examples with lots of source provided.
• Working with the Google Web Toolkit by Robert Cooper. Simple Table example which shows how to create a GWT app. Covers RPC and History.

More advanced

• GWT Demystified: Generators, Part 1 – Excellent article by Ray Cromwell on GWT Generators. The first of a three part series. [part2] [part3].
• Compiling Java to JavaScript. Artima’s Frank Sommers interviews GWT software engineer Scott Blum about the GWT compiler.
• Exploring the Google Web Toolkit by Philip McCarthy. Tutorial to create a Weather Reporter application. Covers debugging, RPC and JSNI.
• – From the official Google Web Toolkit site. If you want to be a GWT contributer, read this document.

Books

• – From the creator of GPokr and KDice, this is the newest GWT book out there. Take a look at my book review.
• – Probably the most popular GWT book published so far. It’s a decent GWT reference that covers most of the important topics.