FamiStudio
FamiStudio - NES Music Editor for chiptune artists & homebrewers
Nasu
The spritesheet editor
Metroidvania V-Scroll Transition [NES Maker Module + demo ROM]
Have you ever wanted your NES Maker game to transition between screens like Mega Man 3?
RetroAsm6502
Relive the 8-bit era with an accurate 6502 assembler and real-time debugger.