Developing Joomla templates can be a real pain if you have to manually code every bit of line in your template to make it work with Joomla but this nifty little plugin for Dreamweaver can make things a whole lot easier for you. It's called the Joomla Template Kit and was developed by Media 65 who also are responsible for making some nice templates. Along with the Dreamweaver plugin, you also get some nice lengthy video tutorials explaining all the steps you need to go through in order to successfully convert existing templates into Joomla friendly versions. The whole thing is pretty effective since it integrates right into the Dreamweaver GUI and I liked working with it a lot!
The tutorial videos also explain how you can convert your templates into zipped files in order to redistribute them over the web. The latest version of the software at the time of writing this article was version 3.0 which can handle both Joomla 1.0.x as well as Joomla 1.5.x templates.
You can head over to this link and check out this handy dreamweaver plugin yourself. Note that in order to buy the package, you will need to register on the website.