Yes, I see more and more initiatives, mainly of small businesses that try to make a difference.
But also bigger companies like Devoucoux are very active. They developed a way to tan the leather used for saddles in an environmentally friendly way. Most of the saddle leather of other brands is Chromium tanned which causes a lot of trouble in the production process but also at the end of the life of the saddle. You can't burn it, because it will release toxic fumes, and you can't put it in the ground because it will stay there forever.
Vegetal tanned leather is much friendlier in the production and is also biodegradable at the end of its lifecycle.
Read more about Devoucoux here: http://thesustainablehorse.com/environmentally-friendly-revolutionary-vegetable-tanned-saddles-devoucoux/
And about other sustainable choices for riders here: