HandBrake is a open-source tool, built by volunteers.
Built-in Device Presets
Get started with HandBrake in seconds by choosing a profile optimised for your device, or choose a universal profile for standard or high quality conversions. Simple, easy, fast. For those that want more choice, tweak many basic and advanced options to improve your encodes.
Supported Input Sources:
Handbrake can process most common multimedia files and any DVD or BluRay sources that do not contain any kind of copy protection.
Outputs:
Even more features
License
Most of HandBrake’s source code is covered by the GNU General Public License, version 2. A copy of which is included with every release in the COPYING file. Portions are covered under BSD 3 Clause.