Visio - Simplify and communicate complex information using data-linked diagrams.
Procore - Procore is the world's most widely used construction project management software. Easy to use, mobile platform with unlimited user licenses.
draw.io - Online diagramming application
Corecon - Corecon offers integrated estimating, project management, and job costing for small to medium-sized construction companies.
yEd Graph Editor - yEd is a free desktop application to quickly create, import, edit, and automatically arrange diagrams. It runs on Windows, Mac OS X, and Unix/Linux.
Sciforma - Enterprise project management software that combines project and portfolio management: portfolio analysis, scheduling & resource management