Hi all.
I'm developing a "Tools" dashlet, just to improve my knowledge of SugarCRM framework. Since it will be a useful (I hope) Dashlet, I decided to publish it in SugarForge site.

What I'd like to do is to keep my Dashlet free, I don't want to sell it. But, at the same time, I'd like to put a "Donate" button : in that way, if someone still believe in honesty, could send me money if the dashlet is actually useful to him/her.

My questions are:

1) Can I do this ? Can I add a donate button (somewhere) in my project in SugarForge ?
2) Which licence should I choose to leave everything free ?
3) I understood that projects on SugarForge are published for free, while in SugarExchange are published for money. Is it right ? Or I misunderstood the rules ?

Thanks to all
Best Regards
FabioG