I edited mine in:
COREL-PHOTO PAINT Essentials 4
It's amazing! (Still learning!)
Just so you know, I used a drop shadow tool (Went lightly with it, it looks terrible if you drag it too far.) Also I used a "Lighting Effect" to make the light on the top and darker near the bottom. I must admit, on your avatar (Jellyfish) the lighting effect didn't turn out too well. I think it's ok but meh.