Tiles

Free to use (license: CC BY-SA 3.0) pixel art tiles.

Tiles are grouped into tilemaps, each tile is 16x16 pixels. I've used these as rule tiles in a Unity project, and I may some day upload example rule tiles made with these (exporting them is not exactly straightforward or easy).

"liquid.png" looks like a just wide image of some mystery liquid, but it is actually a sprite sheet for a 16x32 animation.