This one - I'm learning to LOVE.
It's called the Versa Tool. I love that it fits in my hand.
One of the tips I've heard (and try to remember) is that you only quilt as far as you can reach along the ruler. If it fits in my hand then I'm never trying to quilt beyond what I can reach ... it easily gets wonky if I go further than I can hold.
AND ... using a little gripper tape on the back makes it a non-skid ruler!!