Photoshop is a $500 program, just to warn you. If you decide to download a pirated (illegal) version of it and it crashes your computer, you won't be able to find someone to fix it, as pirated software is illegal. The downloads from download.com and adobe.com, however, are free 30 day trials and I highly recommend you try them!

That said, Photoshop, if you decide to get it, is an awesome program. That's the only program I use for signatures. I'm learning to use some other 3D programs as well, but for signatures, Photoshop is the way to go. Don't worry if your first stuff looks poor. Mine definitely did. It just takes time and practice. Good luck! If you need any help (and if anyone needs any photoshop help), feel free to catch me on AIM!