RSTAB - Structural Frame & Truss Analysis is described as 'RSTAB is a powerful and intuitive software for verifiable structural analysis and effective design of beam, frame, and truss structures according to numerous standards'. There are more than 25 alternatives to RSTAB - Structural Frame & Truss Analysis for Windows, Linux, Online / Web-based and Mac. The best alternative is midas Civil. It's not free, so if you're looking for a free alternative, you could try SkyCiv Structural 3D or ClearCalcs. Other great apps like RSTAB - Structural Frame & Truss Analysis are midas Gen (Paid), RISA-3D (Paid), RISA-2D (Paid) and Etabs (Paid).
PROKON® Structural Analysis and Design is a suite of over forty structural analysis, design and detailing programs. The first PROKON programs were developed in 1989, and today PROKON is used worldwide in over eighty countries.
SOFiSTiK - a universal software package, using the method of finite element analysis (FEA) to calculate and structural engineering, geotechnical engineering solutions of problems of any complexity, analysis of gas- and hydrodynamics.
S-FRAME Software for Structural Engineers Trusted by thousands of structural engineers worldwide for over 30 years, S-FRAME is the design and analysis software of choice for moment frames, braced frames, trusses, bridges, office and residential buildings, skyscrapers...