I think one of the more useful plugins I can still think of would be some sort of collection of developer tools.

The plugin would most liklely start by wrapping up the language tool, console and theme builder. However, that would still not add any value, so I’d be interested to hear about other things that would be useful.

So far I was able to come up with the following list:

• Database mapping GUI
  This would replace/extend the current CLI app to generate mappings
• Skeleton builder for new pages
  Something that creates an empty controller, mapping and access rules, an empty view file
• Form validation rule builder
  Something to interactively generate validation rules that can be cut&paste
• Service wizard
  A (meta) builder that would be able to generate a new service class for a new database table. It would create support methods for the typical CRUD operations

Anything else???