OpenSTL

A GUI-based STL (stereolithography) file viewer and editor

3D-Tool Free Viewer

Visualize STL and DDS files

FREE software for visualisation of STL or OBJ meshes

Blender is the open source, cross platform suite of tools for 3D creation.

Cura aims to be a end solution for personal 3D printing with RepRap based machines.

Entry level tool targeted for viewing, verifying, dimensioning and communicating 3D geometry…

Simple Java GUI for importing and exporting several CAD formats

Magics rapid prototyping software enables you to import a wide variety of CAD formats and to export…

MatterControl is a free, open source app that lets you organize and manage your 3D prints.

Free STL File Viewer

Here’s what MiniMagics offers: Import and save .STL, .magics or .mgx files

Pointshop3D is a system for interactive shape and appearance editing of 3D point-sampled geometry.

This is the software that will drive your MakerBot Replicator, Thing-O-Matic, CupCake CNC, RepRap…

A Free STL Viewer for Android and Windows

Professional 3D printing software streamlines the process of 3D printing, leading to better results.

STL-to-GCODE translator for RepRap printers Here comes Slic3r! Its features are: speed

Multi-platform Gcode and STL viewer for 3D printing

Simple viewer for .stl files.