OpenFX

OpenFX is an open-source, free modeling and animation studio, distributed under the GNU General Public License.

A powerful feature-set includes a full renderer and raytrace engine, NURBS support, kinematics-based animation, morphing, and an extensive plugin API.

Plugin capabilities include image post processor effects such as lens flare, fog and depth of field. Animation effects such as explosions, waves and dissolves add enormously to the flexibility of the program. Check out the full list of the various effect types and let your imagination run wild!