Change to PostgreSQL

Hi all,

I'm new to PostgreSQL. I've been working for about two years with mySQL
but i'm evaluating other options (like PostgreSQL) because of lack of
features and a more restrictive licensing model. Right now what i am
looking in PostgreSQL is:

1) Free distribution even for non free applications (including .Net
driver).
2) Is there a good graphical database designer for PostgreSQL wich also
suppors online database synchronization?
3) Easy of management and robust so it needs almost zero administration
(applications suited for non technical users)
4) Light enough so it can be used on applications installed in a single
PC.

Are those characteristics available in PosgreSQL?

Thanks for your help.

FB