Yes, both Tekla Structural Designer and Navisworks offer a Free Trial.
Tekla Structural Designer is designed for Large Enterprises, Medium Business and Small Business.
Navisworks is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Navisworks begins at $78/Month when Billed Yearly, while pricing details for Tekla Structural Designer are unavailable.
Some top alternatives to Tekla Structural Designer includes YouBIM, SkyCiv, BIM Track, Archicad, ALLPLAN, Tekla Structures, Revit LT, Tekla PowerFab, MasterSeries and bimU.io.
Some top alternatives to Navisworks includes Autodesk BIM 360, YouBIM, BIMx, BIM Track, Vectorworks Architect, Vectorworks Landmark, Archicad, Revit LT and bimU.io.