Photoshop or Gimp Gimp is free Photoshop cost a lot but you can get it for free. < Torrent.
But its pretty hard you would have to watch a TON of tutorials to get really good. Unlike Allie where GFX Just comes naturally. < But i bet if you look at Tuts Allie you would be soo much better.
But on topic download one of those programs make a cool 1 then upload it to an image hosting website. I perfer either Photoshop or tinypic.