You can find a number of new and updated free add-on applications by CAD Studio - here in the Download section and on www.cadstudio.cz.
 
E.g.:

Normals - draw normals of 3DFaces or recolor 3DFaces facing towards/away from the camera
LOMAN - layout manager - quickly switch between layouts, sort layouts
2DPlot - generate AutoCAD 2D curves with parametric math functions - XY=F(U)
LAYNSEL - move selected objects to a picked (sub)object's layer
FieldLink - draw temporary lines between fields and their source objects
Parabola - true spline parabola
TURBO toggle - switch AutoCAD to faster mode by setting all relevant variables
COPY2LAY - copies selected objects to all specified layouts
X-Tools LT - CADstudio Inventor Tools, free limited version for Inventor 2013
 

applications by CAD Studio.3dyantram.info