CalcForge

CalcForge groups free structural, geotechnical, tunnelling and construction tools separately from its paid training programmes. Its beam calculator lets users drag supports/loads and double-click them to edit; it flags an insufficient support arrangement. The documented direct-stiffness method divides spans into elements with displacement and rotation degrees of freedom, then derives bending moment, shear and deflection. A PDF report is advertised. These tools address different models, from beams to bearing capacity and slope stability; keep the selected model and input conditions with the result. The project links a public repository for modifying tools and proposing contributions.