Here is a simple free sprite sheet of a knight that Warren Clark has offered on itch.io.
Although I look out for new items, I also like to go back and highlight some older stuff of interest.
The pixel art here reminds me of the pc game Gods Will Be Watching anatomy wise and the animation is nice and fluid.
Great resource to assist in your own game project!
Althought not explicitly stated, I believe it can be used for commercial and non-commercial purposes without attribution as the other free items on itch.io have mentioned that.
Although it is completely free, there is an option to donate to the author on the site.
This is an early attempt at full working knight sprite that someone can freely use in there game. Will update regularly any feedback good or bad is appreciated.