There are some tools created by me, which are available for download:

FILE DESCRIPTION
separateBySmoothingGroups.zip Version: 3dsMAx 2014 Separates mesh by smoothing Groups.
vtxNormalsToSoftHardEdges.zip Version: Maya2008 or later Convert Vertex Normals to Soft/Hard Edges using Maya Python API.
cleanPerFaceAssignment.zip or from www.highend3d.com: cleanPerFaceAssignment Version: Maya2008 or later This script was originally written by Hiroyuki Haga on C++. Source you can find with Maya C++ API examples. I have done not only "translation" to Maya Python, also some bugs was fixed by me and Script was modified in "my way".
getComponentShader.zip or from www.highend3d.com: getComponentShader Version: Maya2008 or later This script allows to get Shading Group from a selected polygon and to assign it to other polygons without Hypershade.
3D View: Toggle Views Version: Blender 2.63 This add-on toggles Camera from PERSP view to SIDE view and back ( depends of camera vector )
3D View: Toggle Views Version: Blender 2.80 This add-on toggles Camera from PERSP view to SIDE view and back ( depends of camera vector )