Don't learn from these docs! Bug people on IRC instead.
Where would we be without 'em?
Super Metroid Integrated Level Editor, by Jathys. Last stable version.
SMILE (last build)
Super Metroid Integrated Level Editor, by Jathys. Unstable version.
Super Metroid Integrated Level Editor, modified by JAM
Metroid Fusion and Metroid: Zero Mission editor, by interdpth
Wanna hack Metroid? You need Editroid! Can't lose that belly fat? You need Editroid! Are you drowning in credit card bills? You need Editroid! Do you want to please your lover in bed? You need Editroid! That's right! Editroid is the tool to fix any problem that can be fixed by editing Metroid!
MetEdit, the other Metroid editor
M2 Edit, a Metroid 2 editor, unfinished
Tile Layer Pro
Extremely useful tool if you plan on doing any sort of graphic editing
Used for patching ROM's and creating patches
For those of us who can't convert SNES addresses in our head yet, this little gem of an application takes away the headache of trying to learn how
A must-have for those diving into the world of assembly
Another graphics editing tool
The 3rd Graphics editing tool, this one can edit Mode7 graphics though
HxD, a free hex editor
Geiger's Snes9x debugger
Very helpful program for advancing ROM hackers; allows tracing of specific data for hex editing, among many other features
IPS XP, another IPS patcher
VSNES, a save state viewer
Ever needed something for sprite rotation without antialiasing? RotSprite has you covered.
A very useful editor by smibes1994. It's basically like a extension of the "Game Behavior" menu in Smile. It's in Japanese and English.