The Sea Dog Floating Winch Handle
This is a lightweight nylon and plastic handle that is foam filled. This makes it extremely light weight and floats, so if you drop it overboard you can easily recover it. The lock release goes both ways, so lefty or righty it is easy to use.
It has ball bearings in the handle, so it rotates easily.
Please do note that because it is plastic, this isn't designed for high load applications. This is perfect for a small keelboat that uses small winches.