PointerStick offers a flexible and incredibly customizable tool that replaces your cursor with a virtual pointer. It can get so big that it takes up almost all of your screen. The application does exactly what you'd expect it to and can be of great assistance for big-screen presentations.
PointerStick downloads an executable file, so you can take it with you wherever you need it. That's handy if you have to do a presentation on a computer that isn't yours. The application turns your cursor into a full-fledged pointer stick. You can change the size, transparency, and design of the stick in plenty of ways. You can actually make it take up an entire cross-section of your screen if you want. However, you can't change the direction the stick points by yourself. It automatically flips and rotates, but it's not as intuitive as you would probably want it to be. There are plenty of different ways to hide and reveal the stick, too, so you don't have to keep opening the application to get rid of it.
If you were to design the perfect pointer program, PointerStick would come very close to what you want. It's chock full of different designs and features that let you create the exact pointer you want. It presents a good solution for users looking for a tool to aid in their lectures and big-screen presentations.