These Organizations are all for uplifting the Animation in
general.
We will later on split the Open Source from the rest.
Blender

About Blender
Blender is the free open source 3D content creation suite,
available for all major operating systems under the GNU General
Public License.
Animation SA

Welcome to Animation SA, home of the South African Animation
industry. Our new site has lots of new features for members and
Blender Art Magazine

The magazine was started for the blender community, having the aim
of publishing a bi-monthly PDF magazine; free for download. The
goal of the magazine is to provide quality learning content for the
blender community, from the efforts of the community itself.
BlenderArt Magazine is released under the Creative Commons
Attribution-NoDerivs 2.5 license. friends of our organization so
please sign up to enjoy our community.
BlenderArtists.org

BlenderArtists.org is the most popular community site dedicated to
the free, open-source 3D animation program Blender. On the site,
users of the program can discuss their artwork, ask questions and
find resources such as textures and tutorials.