DENZI's 16x16 orthogonal tilesets
One of many of Denzi's wonderful pixel art sets. 16x16 pixel 3/4 overhead orthogonal perspective stuff including dungeon tiles, monsters, items, character paper dolls, ability icons and more. Monochrome, Sci-Fi, medieval, modern, animated, lots of stuff.
This may work well with Denzi's other works (More coming soon!)