OpenBridge Modeler is described as 'Want bridge software that does it all? Try OpenBridge Modeler, Bentley's 3D parametric modeling, analysis, and load rating software for bridges'. There are more than 50 alternatives to OpenBridge Modeler 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 SkyCiv. Other great apps like OpenBridge Modeler are RISA-3D (Paid), midas Gen (Paid), Abaqus Unified FEA (Paid) and RISA-2D (Paid).
midas Gen is one-stop modeling, analysis and design solution for building and general structures. It features an intuitive UI, advanced analysis features, practical output and powerful design capacities using various standards
SkyCiv Structural 3D is a powerful structural analysis and design software on the cloud. Nothing to install or download and users can subscribe on a month-to-month basis so there's no life long commitment. It's also free to get started.
For nearly 30 years, ETABS has been recognized as the industry standard for Building Analysis and Design Software. Today, continuing in the same tradition, ETABS has evolved into a completely integrated building analysis and design environment.