In the spirit of Halloween, I made this cool demon-ish sword; heres how you can design one too! I used the free version of Autodesk Sketchbook for the iPod touch, however it would be easier I imagine to use the pc version.
Step 1: Sword design
Start with a blank slate, and turn on the vertical mirroring tool. Begin drawing the blade using a dark color (I just used black for the outline). After creating the general outline for your blade, Add some curvy lines below to create a guard.
Step 2: Make blade
Add a blood-vane down the center of your blade; I used a light blue color and some curvy mirroring to make the blade look a bit "magical". Add another set of lines down the sides of the blade to give it some edges - make sure your still using the mirror tool it will make things a LOT easier! After adding your edges, fill in the blade with some color - I recommend using a light color for the outside edge, and a slightly darker color for the main portion of the blade. I recommend using the paint bucket tool. Don't worry if you cant fill every nook and cranny; we'll take care of that later.
Step 3: Add colors
Now it's time to put a handle on this baby! I just used some curvy lines starting at the bottom of the guard, and made a couple rows of them. Then add a nice hilt to the bottom of your handle. Now go back and add some color to your handle, your hilt, and your guard.(again, using the bucket tool is easiest, and don't worry about every little bit) If you want to start getting fancy, you can even add a little hue down the center of the sword like I did, using a mostly opaque brush of your choice.