feh is a mode-based image viewer. It is especially aimed at command line users who need a fast image viewer without huge GUI dependencies, though it can ...
Autodesk Viewer is a free online viewer for 2D and 3D designs including AutoCAD DWG, DXF, Revit RVT and Inventor IPT, as well as STEP, SolidWorks, CATIA and others.
A free and open source web solution to visualize and explore 3D models right in your browser. Supported file formats: obj, 3ds, stl, ply, gltf, glb, off, 3dm, fbx, dae, wrl, 3mf, stp, ifc, bim.
SHADERed is the most powerful shader IDE/editor. It is open-source, cross-platform & has features such as the shader debugger, compute shaders, plugin API, etc...