hello?
I m a developer with microsoft tools for over 16 years , for the last five years I m developing wuth .net .
now i m thinking about developer an application that i can sell on the net but the problem with developing such a tool is the cost of the licensing of the tools like sql server and .net developing kit .
do you think it will wise to start developing with open source tools ?
if so where can a start learing that ? I m intersting with developing web applications first the has database .

Thank you in advance .