Gefen 4x1 HDMI Switcher
This wonderful workgroup tool has become a favorite of my students. Because most modern platforms (including smartphones) support HDMI or DVI, the Gefen 4x1 HDMI Switcher allows my students to sit around a small conference table and rapidly swap between each other’s laptops and put them up on the shared screen. We’ve gone a bit further and grabbed a bunch of ultra-thin HDMI cables from the folks at Monoprice to keep the cable clutter down. We also have a bag of HDMI adapters for smartphones and tablets, along with a DVI-to-HDMI adapter plug for older Macs.