What are some good tools for doing 1990s pixel art? Specifically sprites, but maybe some larger backgrounds. I see someone's done a JS version of DeluxePaint! Any others people really like?

Slightly heretically, I'd love one that handled alpha channels well.

Recs so far:

Aseprite
Pro Motion NG
grafx2
piskel
pyxel edit
Pixelorama
Cosmigo
Libresprite

My brain is very small, so starting with the #1 most common which is Aseprite.

@TomF Late to the party, but I recommend Evil Pixie. Well, I would. I wrote it.
https://evilpixie.scumways.com/

Just two more users, to double the user base!

Evilpixie, a pixel editor