Pixel Pix - Turn your photos into pixel art
Pixel Art Studio - A purpose-built drawing tool for pixel artists
Voxel Builder - Design and edit 3D voxel models in your browser.
Aseprite - Aseprite is an art program dedicated to the creation of pixel art.
Crossyards - Tell a story in 3D pixel art
Pixel Art to CSS - Draw and animate pixel art, export the results to CSS