mudSkipper

Controls

A / Z: place down tile or object
(hold) B / X + LEFT or RIGHT: swap between tiles 
(hold) B / X + UP or DOWN: swap between tile sets 
START / RETURN: open options menu
SELECT / SHIFT: open build menu
ARROWS: move cursor or navigate menus

!TO SAVE!
left click in your browser (Firefox, Chrome, Safari for sure work) and select "save image as"

Editors

Easy Map: made for rapid development, split into sections oriented to build a number of useful maps fast and intuitively.

Full Map: place each tile down one by one for total control over your design.

Coming Soon! A full version will include 4 sprite editors, topdown/ overworld, portraits, monsters, and half-body VN sprites-- as well as a total of 512 tiles to swap between (8 sets of 64) for even more creativity!