Simple data integration forms

Hi there.

As a newbie, I have an obviously dumb question.

I'll supposed to provide simple forms to let some users type data which can not be integrated using Kettle (For instance, market share data coming from other companies).

How should I do that ? Should I build a PHP application oin the same server ? Try and use CTools ? I honestly have no clue.

Could someone tell me what the best practice would be ?