Our flagship product is the LAStools software suite, which is an easy download (20 MB) and is available for licensing. It is a collection of highly efficient, batch-scriptable, multicore command line tools. We have tools to classify, tile, convert, filter, raster, triangulate, contour, clip, and polygonize LiDAR data (to name just a few functions). All of the tools can also be run via a GUI and are available as a LiDAR processing toolbox for ArcGIS versions 9.3, 10.0, and 10.1 of ESRI. See http://lastools.org for details.
LAStools are probably the fastest and most memory efficient solution for batch-scripted multi-core LiDAR processing and turn billions of LiDAR points into useful products at blazing speeds and with low memory requirements.