Diamonds is described as 'The perfect software for structural design analysis of beam grids, floor slabs, rafts, walls, frames and multi-storey buildings, ... in concrete or steel. Development of calculation engineering design software with powerfull tools en simple user' and is an app. There are more than 50 alternatives to Diamonds for Windows, Linux, Web-based and Mac. The best Diamonds alternative is CalcSteel, which is free. Other great apps like Diamonds are Robot Structural Analysis Professional, CloudCalc, SkyCiv and Resultant.