Natron

Thanks to @czarek for heads up on this "thing" called Natron.
Actually in version 1.2.1 and beta v2, it comes bundled with lots of useful plugins and features and there's some more you can throw in for free, like the TuttleOFXs. If you're doing frequent or/and complex composite work and want a FREE node based workflow solution, check this baby out, it's a clone of Nuke... for more adventurous, less purchasing power people with loads of work :P

It is not by any means my "area", so other people can take over the thread and give better and knowledgeable answers and advice.
I can only say that I'm really enjoying the experience, cheers =)

Natron forum - https://groups.google.com/forum/#!forum/natron-vfx

 
 
MERCI BEAUCOUP à Alexandre Gauthier-Foichat et Fréderic Devernay
and all people contributing to this project