Noodle

Noodle is a 1-bit illustration program designed for the Uxn virtual machine. It features a handful of patterns, a pixel-perfect clean up brush, animation capabilities, zoom functionalities and can export and import bit maps is currently used in the creation of various monochromatic illustration projects such as the Neauismetica, it shares a lot of the functionalities of the sprite sheet editor nasu. 

If you don't already have the Uxn emulator, see the installation guide