I am working on web application development tool, that will allow power users to create applications, kinda like MS Access. Sure it's not close to Access, but right now EasyDb can
generate form or grid with
text field
date picker field
combo box- data from local store
combo box- data from remote store
number field
Within grid you can add, edit or delete data and data are saved to database
generate buttons so that you can link one form to another
buttons can pass parameters based on selected values
I've tried to get it working and I couldn't. I don't think it's been maintained in a while. If you're looking for a database management tool based on ExtJS, you can check out this new tool: