Guthrie CAD/GIS Software Pty Ltd.
CAD Viewer lets you view, print and convert CAD files.
It is a compact free CAD Viewer that allows you to move and zoom in and out.
Data Design System
It allows you to review, convert and print Open BIM projects.
JETCAM International Ltd
It is a free tool designed to allow viewing of all major 2D CAD files.
Open Source Geospatial Foundation
MapGuide Open Source is a platform for developing web mapping applications.
BackToCAD Technologies, LLC
It is a standalone program that works independently with all CAD Systems.
sView is an open-source universal stereoscopic viewer.
Teunis van Beelen
It is an open source, multiplatform, universal viewer.
An OpenScience project
Jmol is an open-source 3D Java viewer for chemical structures.
Open source BSD-licensed viewer software for 3D virtual worlds.
It is an open source third party viewer for Second Life and OpenSim grids.
Pocket PC CAD Viewer is the high quality viewer of AutoCAD DWG and DXF files.
The Imprudence Project
An open source metaverse viewer project based on the Second Life Viewer source.
Bentley Systems, Incorporated
It is a free CAD viewer for DGN, DWG and DXF files.
Dolphin Viewer - it is a Second Life open source viewer project.
Jessica Wabbit, Kentron, Team Purple bot
Kokua Viewer is an open source metaverse viewer project.