Quad LCD Monitor Free Standing Desk Mount/ Stand Heavy Duty Fully Adjustable fits 4 /Four Screens up to 24" ~ (by VIVO)

Monoprice Adjustable Tilting Dual Monitor Desk Mount Bracket-Black (105561)

Hex LCD Monitor Stand, Desk Mount, Free Standing, Heavy Duty & Fully Adjustable 6 Screens up to 24" (STAND-V006F by VIVO)

Dual LCD Monitor Desk Stand/Mount Free Standing, Holds Vertical 2 Screens up to 27" ~ (by VIVO)

Triple LCD Monitor Desk Stand, Desktop Mount, Free Standing Vertical 3 Screens up to 27" (STAND-V003D by VIVO)