An Open Source 3D Model Viewer I just released: open3mod. Supports 30+ file formats, including Collada, OBJ, STL, FBX, BLEND, 3DS, X, MD5 ... and does export to STL, DAE, OBJ and some others, which may make it useful if you want to get some ancient 3D model into e.g. STL for your printing. It is backed by Open Asset Import Library (also known as assimp), which I've been co-working on for a couple of years.
Supports split view, multiple open tabs. animation playback and deep insight into the scene hierarchy. Also, you can fix missing textures on the fly.
Full list of supported file formats
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I've been working on this on and off for about two years. It has never been a priority, but it continuously distracted me from other stuff, so I figured it was time for a first release.
Feel free to share! Any feedback welcome.?
