Metalsmith - An extremely simple, pluggable static site generator.
PlanSwift - PlanSwift allows contractors to create accurate project estimates specific to their individual trade.
Nikola - Nikola is s static site generator tool written in Python.
Methvin - Project management and estimating tool designed for the construction industry.
GatsbyJS - Blazing-fast static site generator for React
Corecon - Corecon offers integrated estimating, project management, and job costing for small to medium-sized construction companies.