I provide my programs for free with no catches, viruses, stds, spyware, ads, watermarks, or trial periods. I don't like any of that stuff, so you probably don't either. My stuff is free because you would just pirate it if it wasn't. Besides, that's what I would do...
However, if you do like any of my programs, find them useful, and have some sort of strange urge to compensate me for my work, you can use the following: