Plugin SDK
If you're proficient in Cocoa programming, and you own at least the Mac OS X 10.4 (Tiger) developer tools with Xcode, creating a RapidWeaver page type, or plugin as we call them, is easy.
Theme SDK

If you have a basic understanding of HTML & CSS then creating a theme should be straight forward. We've put together a theme tutorial which covers all the basics. We've also included full documentation and a blank template theme.
Theme Styles
Theme Styles control the colour and layout of existing themes. Theme Styles can either be created from within RapidWeaver or by using an HTML editor as they are just simple XML files. Browse The Add-ons For Styles
Snippets
Snippets are small XML files that contain "snippets" of code. Amazingly versatile and very simple to create, you can either create them inside RapidWeaver or use an HTML editor to roll your own. Browse The Add-ons For Snippets
RapidWeaver Developer Network
The RapidWeaver Developer Network showcases the talents of the best-known third-party developers around. From beautiful themes, and versatile plugins to fantastic utilities - all are made possible by the RapidWeaver SDKs listed below.
Plugin SDK - Cocoa
If you're a Cocoa guru, all the resources you'll need to build the next great plugin below. The RapidWeaver 4 SDK also shows how to save into the new XML-based format.
Theme SDK - XHTML & CSS
If you're looking to build themes for RapidWeaver, this is the toolkit to grab. The tutorial files can also be downloaded as a separate files below, if you’re looking for a particular item.