Tassima
I had no idea those types of programs existed! I just googled a few. Did you pay for your program or were you able to find one for free? If you had to pay, how much?
PC Stitch costs about $50. The trial version has no time limit BUT it won't save, so you'd have to do a whole pattern from start to finish in one sitting, and print out as many as you think you'll need.
My Photo Stitch is completely free, but you have to edit the image quite a bit before you run it through their program. It would be good for converting small graphics like pixel art or avatars into patterns.
You can also use your own art program. Most have the ability to put a grid over your image. If you imagine that every square of the grid represents a stitch, you can follow along the raw image. The only downside is that you have to match the floss colors yourself, and that can be tough if you don't have a ton of floss lying around the house.