CFAST, MAYO, LEKAN, DESIGN added to Software directory wiki.
Blender Earth Modeler Add-on | 3D Google Earth (City/Terrain) inside Blender
Graphite is an in-development raster and vector graphics package that's free and open source. It is powered by a node graph compositing engine that fuses layers with nodes, providing a fully nondestructive editing experience.
OSAFE Workbench (FreeCAD addon)
The OSAFE workbench by Ebrahim Raeyat. This FreeCAD Addon is a collection of civil engineering tools, originally designed as a workaround for issues with CSI SAFE. The addon is available via the regular Addon Manager.
Open Source software to host and share sun path visualizations.
Just reviewing this thread regarding OS and Free software. Although not specifically AEC software but for myself and others that plan to record video tutorials and post edit, Blackmagic offers a world class video editing application called Davinci Resolve. Fantastic application and very open community.