Similar to the Sweep LIDAR, RPLIDAR (http://www.slamtec.com/en/lidar) is another low-cost LIDAR for hobby projects. RPLIDAR and Sweep have the same applications: SLAM and autonomous navigation:
Figure 30: RPLIDAR
There is a ROS driver for interfacing the RPLIDAR with ROS. The ROS package is at http://wiki.ros.org/rplidar. The GitHub link of the package is https://github.com/robopeak/rplidar_ros.