Which are the best platforms/tools used to systemise NEC3/4 contract workflows?

There are a few platforms on the market outside of CEMAR, based on experience which tools/platforms are the optimum for systemising NEC contract workflows and provisions and why…I’ll be keen to understand the pros and cons of each and unique functionalities/selling points to each one - CEMAR, Unifier, Aconex (newly integrated with NEC) and A-Site to name a few…