Well, I don't know whether this is really a good idea. Last year someone asked for my bank account number, because he wanted to pay for Nemp. I told him, he should send me some money by mail. And he did.
But I thought: Hey, this should be easier. So here is one of these nice PayPal-Buttons. Just click it and enter the amount you want to donate.
To be clear:
Nemp is free and will be free. And I don't want to give anybody a bad conscience when he or she doesn't donate. But if someone wants to, he has now an opportunity for this.