SplitScreen X is built from the ground-up for FCP X and includes simple onscreen controls and a wide variety of rectangular and angular screen elements. Add split screens to any project by simply dragging and dropping inside FCP X.CrumplePop: SplitScreen X for Final Cut Pro X.
For the next week, SplitScreen X will be $39 with the coupon code: SPLX-0036-INTR-1003. After that, the price is $75.
CrumplePop SplitScreen X from CrumplePop on Vimeo.
If you already own SplitScreen for FCP 6/7, then SplitScreen X is free. You can find the update at the link above.