If one of the obstacles to data entry is normalization, perhaps an updatable view if your database supports it.
Not as common as you might think. It is a hard thing to search for, and the ones I have been able to find all suck.
I wrote a PHP application a long time that allowed you to create a GUI for an 'arbitrary' SQL database table, using an XML schema to configure the appearance, validation etc. of the fields. Life got in the way, and I stopped development before it was ready for prime time. Fifteen years later, I went looking for something with similar functionality and was surprised at how few options there still were.