PyxelEdit 3D Viewer
Game Maker: Studio
With the 3D Viewer PyxelEdit 2D sprites display from pyxel edit on fake 3D. The viewer only updates the files if the Pyxel Edit files are saved (Ctrl+S). There are many settings like set to pixelated, fix edges (while you're scaling up), pin windows (so the they stays always in the foreground), etc.