HEATKEYS

CADTutor provides free video tutorials, articles, downloads and a busy community forum for users of AutoCAD and associated software.

Simpson Strong-Tie - structural connectors, shearwalls, anchors, fastening systems, and seismic testing for stronger and safer wood and steel construction.

Vlier provides the highest quality spring loaded devices, ball plungers, leveling mounts and mechanical components to aerospace, automotive and other major industries.

Thingiverse is a universe of things. Download our files and build them with your lasercutter, 3D printer, or CNC.

Eberl Iron Works, Rooftop Support Systems, Traffic Safety Products, Unistrut Buffalo Supports, Metal Fabrication Services, Systems Installation and Design, Stairpans, Fiberglass, Lindapter, Trolley, Stainless, Aluminum, Telespar, Unistrut, stairpans

CAD Blocks FREE! Download FREE CAD Blocks from a variety of categories and CAD disciplines. Browse before you download as all of our CAD Blocks have detailed thumnail views!

Autodesk Seek is the online source for product specifications and models for use in Revit, Autocad, 3ds Max, Maya and other CAD applications

We’re developing open source industrial machines that can be made for a fraction of commercial costs, and sharing our designs online for free. The goal of Open Source Ecology is to create an open source economy – an efficient economy which increa...

GrabCAD - a free CAD model library with 2D / 3D CAD files available for software like SolidWorks, AutoCAD, Autodesk Inventor, Solid Edge, SketchUp etc.

This cloud-based ArchiCAD-integrated community database collects and provides direct access to GDL elements. BIMcomponents.com helps you obtain trustworthy 3D or 2D elements in the form of parametric GDL objects.

The largest UNISTRUT distributor in North America

LibreCAD forum.