Metalsmith - An extremely simple, pluggable static site generator.
Fieldwire - The construction app for project and task management in the field.
Nikola - Nikola is s static site generator tool written in Python.
PlanSwift - PlanSwift allows contractors to create accurate project estimates specific to their individual trade.
Assemble - The static site generator for Node.js, Grunt.js and Yeoman
PlanGrid - The #1 construction app. Used by thousands of companies to save time, money, and ditch paper plans forever.