FlashMNT 4.51 is a tool that allows the creation of a Digital Terrain Model and 3D computations. From points and/or breaklines, create a DTM, then use the various fonctions of FlashMNT to apply a mesh, color a DTM by altitudes, compute cut and fill quantities, vizualise cross sections of the terrain, calculate areas and volumes, etc. FlashMNT comes with 28 easy to use functions :

 

See FlashMNT online manual