Game Boy filter for your images.

Open-source painting software that even works on Linux.

My past (when I still used Windows...) go-to image editor. Supports plug-ins and whatnot.

Faithful recreation of Windows 95/98's MS Paint in-browser. Lets you export a process as a gif.

Lots and lots of older smiley emotes. Love those.

Practice the fundies with free Loomis.