Adonit was the first company to take a totally different approach to iPad styluses with Jot ($20), a product the company has been selling for a few months after a successful Kickstarter campaign. It's unique in that the tip, rather than being made of foam or soft rubber, is a clear plastic disc attached to a freely pivoting ball. The idea is that this setup provides far more precision for drawing or writing; the user can actually see the contact point…