So you have come here, because you like something I wrote so much that you feel the immediate urge to make me happy, is that so? Well, you have come to the right page!
Of course all software on this page is free (as in beer and speech), but developing consumes a lot of time and it's always nice to be rewarded nonetheless. So, if you feel like parting with some of your credits, feel free. Any amount is welcome. :)