For my own reference.
The-Saddle-Club: 2 per week
Last submission: October 12, 2017
Submit again: Any time
Realistic-Equine: 2 per week
Last submission: October 12, 2017
Submit again: Any time
Allowed: horses, completed, any medium
Creative-Sketches: 3 per week
Last submission: August 19, 2017
Submit again: Any time
Allowed: Sketches, completed, coloured, black and white
WeLoveTraditionalArt: 1 per month
Last submission: October 12, 2017
Submit again: November 12, 2017
Allowed: Completed work, any traditional medium, sculptures
SketchUnion: 1 per day
Last submission: June 9, 2017
Submit again: June 10, 2017
Allowed: Sketche