Slic3r is a new STL-to-GCODE translator. It has the following goals:
- easy configuration
- provide both a graphic interface and a complete command line one
- open development (hosted on Github to allow for forks, pull request and contributions)
- new features
- easy installation (no dependencies required)
Slic3r is available in precompiled packages for MacOS X and WIndows. Linux packages are coming.
It's also possible to git clone and run Slic3r from there to stay current.
For more information see http://slic3r.org/