Apple Dashcode Beta Released
Apple posted a beta of their upcoming Dashcode development software for widgets earlier this month. A recent Apple Developer Connection News mailing started publicizing it.
Dashcode is a new application for developing Dashboard widgets coming in Mac OS X 10.5 (Leopard). Dashcode is everything you need to create great Dashboard widgets.
The final version will be shipping with Mac OS X 10.5 (Leopard) but the currently released beta appears to run fine under Mac OS X 10.4 (Tiger).