The document discusses various developer tools for the WebObjects framework. It provides information on available versions of WOLips, what's new in the latest version, how to link to WebObjects javadoc documentation, how to decompile code on the fly in Eclipse, and two in-browser tools - ERProfiling and SnapshotExplorer. ERProfiling helps profile application performance at the page level, while SnapshotExplorer allows browsing application snapshots to see what the object graph looks like compared to the database.