Here are some popular forums:

Our Facebook page:
https://www.facebook.com/pivotanimatorofficial

Our Google+ page:
https://plus.google.com/u/0/communities/101456864832863618916

In English:
http://www.pivotanimation.org/
http://thedarkdemon.com/
http://animator.net/
http://www.droidz.org/
http://the-pivot-forum.niceboard.com/
http://swfanimationsinc.proboards.com/

En français (French):
http://pivot-land.forumactif.fr/

Auf Deutsch (German):
http://pivotforum.de/

En español (Spanish):
http://bluesticks.foroactivo.com/
http://all-pivoters.activosforos.com/forum

w języku polskim (Polish):
http://en.pivottube.pl

Português brasileiro (Brazilian Portuguese):
http://pivot5.forumeiros.com/
http://pivotbrasil.forumeiros.com/
http://stickfunny.forumeiros.com/

в России (Russian):
http://admirably.ru/

Bahasa Indonesia (Indonesian):
https://www.facebook.com/groups/1413764978876379/

If you would like to add other forum please send us a link at support@pivotanimator.net