Procore - Procore is the world's most widely used construction project management software. Easy to use, mobile platform with unlimited user licenses.
LucidChart - LucidChart is the missing link in online productivity suites. LucidChart allows users to create, collaborate on, and publish attractive flowcharts and other diagrams from a web browser.
Aconex - Aconex is a cloud-based construction management platform.
draw.io - Online diagramming application
Infor Construction - Infor Construction provides the accurate information you need to manage your business more efficiently and profitably.
PlantUML - PlantUML is an open-source tool that uses simple textual descriptions to draw UML diagrams.