website: http://natron.inria.fr
Hello,
Natron is 100% OpenFX v1.3 compatible , you can see a non exhaustive list of most of existing plug-ins here .
This means most compositing tools such as Sapphire from Genarts or Furnace by the Foundry work totally in Natron.
You're not a commercial plug-ins fan ? Fine ! Many open-source OpenFX plug-ins exist, notably the major suite TuttleOFX. Also Natron uses many other open-sources projects in order to provide the end-user some flexibility: OpenColorIO for colour management and OpenImageIO for image reading/writing. Best, Alexandre