Recommendations for RAD (web) application development..?

[Chanchao]

I've been researching development IDE's, Frameworks, toolkits that are

* Free 
* Resulting application runs on Linux & Windows
* Can use a variety of databases, esp. MySQL and SQL Server
* VERY easy to use, very little coding, preferably drag & drop, fill in
some properties, write the business logic, then run. 
* Optional: Web based. (But also interested in client-server
environments)

Obviously some kind of PHP Framework based setup came to mind, but
there's MANY of them!!! It's impossible all of those will still be
around a year or two from now. 

Most of them don't look very 'finished' yet.. Checked out lots of things
from Ruby on Rails to a bunch of PHP + Ajax frameworks to Lazarus &
FreePascal..

My company sells one particular application that's currently in MS
Access + MS SQL Server and the licensing issue remains a serious burden.
We need to move away from this, but.... to what??  Its mostly for
reasons of cost/licensing. MS Access (Office) is expensive!!
(Technically it works really very reliably because of the SQL Server
back-end en development/programming is a breeze.)

One system that I was very impressed with was "Servoy", very, very nice
and easy to code. It's however very very not free also. :)

Cheers,
Chanchao