I've been learning pixel art to open the scope of my game design skills and I've been using Piskel https://www.piskelapp.com/. I'll be talking more about that on a different post, but for now here's an asset pack I made of basic human sprites. I left details blank as these are supposed to be something for people to edit as they need. I may make a second pack down the line of generic characters, but for now here's 3 sprites.