Diamonds is described as 'is the perfect software for structural design analysis of beam grids, floor slabs, rafts, walls, frames and multi-storey buildings, ... in concrete or steel'. There are more than 50 alternatives to Diamonds for Windows, Linux, the Web 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 Diamonds are RISA-3D (Paid), midas Gen (Paid), RISA-2D (Paid) and Etabs (Paid).
- 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. View 28 alternatives to SkyCiv Structural 3D