Leap Motion, the company behind the technology and currently there is their small USB-based controller comprised of two cameras and three infrared LEDs. Leap Motion is intended for new levels of human-computer interaction similar to Microsoft's Kinect.
Pre-orders of the Leap Motion controller are expected to ship in mid-May and now the Leap Motion SDK has added in Linux support. The Linux support for the "Leap Linux SDK" is intended for Ubuntu 12.04 LTS and newer.
The new SDK release also provides new finger tracking, new settings, bug-fixes, new device firmware, and more. The SDK and other details on the company and hardware are available at LeapMotion.com.