Apple's made a fresh appeal for third parties to design Dashboard Widgets to run in its new Mac OS X Tiger.

The company is also on the look out for Automator Actions and Spotlight Plugins and is offering detailed submission guidelines to those who wish to put forward their work.

Apple is looking for innovation, inventiveness or usefulness, as well as unique features or functionality. It also wants developers to "effectively and elegantly utilizes the aqua interface".

Another must is that the submission should have a complete feature set – Apple doesn't want to beta test software.

Most importantly the software must be built for Mac OS X or Carbonized, and at least one working link to download the software should be provided.

Apple offers more information here.