Tools

Compilers, Assemblers, and Toolchains

• PVSnesLib - Programmer Valuable Snes Library, SNES framework toolchain and C compiler
• cc65 - 6502/65816 assembler, and 6502 C compiler
• WLA-DX - Wzonka-Lad Assembler Deluxe, multi-platform assembler, includes SNES 65816 and SPC-700
• asar - patch-oriented SNES assembler
• bass - Near's table-based assembler with support for for SNES 65816 and SPC-700
• Free SNES Assembler - lightweight SNES assembler by Bisqwit
• xkas-plus - multi-architecture assembler, includes SNES 65816 and SPC-700
• TASM - Telemark Assembler for DOS, freeware table-based supporting several processors (WIN64 build, SPC700 table definition)

Debugging

• Mesen
• bsnes-plus
• no$sns

Sound

• SNES GSS - tracker and sound/music driver
• Furnace - chiptune tracker

Graphics

• SuperFamiconv - command line tile graphics converter
• tiledpalettequant - javascript webpage utility to reduce images to tile and palette combinations

Web tools

• SnesInstructionCycleTool - calculates CPU cycles and master clock cycles under different conditions
• Mode7Preview - allows you to specify formulas for Mode 7 registers per-scanline and view the result
• Telinc1 Mode 7 Simulator - allows you to adjust the Mode 7 register parameters and see the result, and source frustum
• 65816 Chiplab - Run assembly against a real 65816 through the browser. Outputs the buses each cycle.

ROM management

• uCON64 - ROM manager and copier tool.

Emulators

Popular emulators, most of which do not have debugging capabilities.

• bsnes
• Mesen
• Snes9x
• ZSNES