Multiple-Slit Streak Tube Imaging Lidar (MS-STIL) represents a new method for using streak tubes in a laser radar configuration. The MS-STIL approach uses several slits instead of the usual single slit to provide a number of additional capabilities over conventional laser radar systems. System configurations for providing 3D single-laser-pulse scannerless imaging, 3D multispectral imaging, 3D multispectral fluorescence imaging, 3D polarimetry, and combined 3D spectro-polarimeters are presented. In addition, a very high-speed laser diagnostic system capable of measuring laser wavefront changes at GHz rates is discussed.