Tricot
I have been working on a pixel art tool... but in 3d. Basically painting pixel art directly on your low poly models. http://tricot.studio I found it weirdly complicated to do that on other software tools like Blender or Autodesk. I just wanted to paint pixels on my 3d characters! So I built my own thing to achieve that. You can import and export FBX. I am working on a save system so I can include a version control feature.