HeroMachine lets you unlock your inner artist, enabling you to create professional-looking illustrations even if you can't draw a straight line. Just choose a pose, then pick a set and genre of items and click to add them. To save your character as an image in HeroMachine 2, press ALT-PrintScreen in Windows or Command+Shift+3 on a Mac to capture the entire screen (including your character) to the clipboard. Then open a paint program (like the aptly-named Paint in Windows, which you can open by going to Start - Run and typing in MSPAINT), go to Edit-Paste, and the screen will appear. Then you can crop it and save it wherever you like.
Click the big orange PLAY button below if the creator doesn't load at first.