Darktable - darktable is an open source photography workflow application and raw developer.
Blender - Blender is the open source, cross platform suite of tools for 3D creation.
RawTherapee - RawTherapee is a free RAW converter and digital photo processing software.
Sculptris - Sculptris: Enter a world of digital art without barriers.
UFRaw - The Unidentified Flying Raw conversion utility
Misfit Model 3D - Misfit Model 3D is a 3D model editor that basically operates with triangle-based models.