I have recently started my own small development company and was looking at developing a framework to sell to clients. I discovered that there were many open source solutions already developed, licensed under the GNU Affero General Public License (AGPL).
I would like to know if I could use one of these and customize it to my own liking and market it as my own product. What would the ramifications of that be? Would I have to tell clients that the system consists mostly of free components?
The idea is to not sell the product itself but instead charge people for the use thereof on a monthly basis. This product will be web-based.
I have tried reading the licensing information but can't quite understand it. I would like to make 100% sure of what I can do before I run into any trouble.
The project in question is http://www.projectpier.org/