Hex Editors

• Hex Workshop - A hex editor with many integrated tools, but doesn't do much more than free hex editors can do. 🪟💸
• ImHex - A newer, modular hex editor for reverse engineering and programming, with features suited to romhacking. 🐧🍎🪟
• WindHex32 - A hex editor with romhacking features, especially ones targeted for SNES games. 🪟

Reverse Engineering Frameworks

• IDA Pro - The fully-featured version of IDA Free. 🐧🍎🪟💸

Translation

• Kuriimu2 - A "general purpose game translation project manager" for making fan translations. 🐧🍎🪟

Patchers

• beat - Creates and applies BPS patches, a format which is a spiritual successor to the IPS format. 🪟
• Lunar IPS - Creates and applies IPS patches. 🪟
• XDelta - An app for creating and applying .xdelta patches. 🪟
• Online ROM Patcher - An online app for applying patches of various formats. 🐧🍎🪟

Debugging Emulators

• FCEUX - An NES and Famicom Disk System emulator including features for romhackers. 🐧🍎🪟
• NO$GBA - The "gold standard" emulator for working with GBA and DS games. 🪟

Graphics Editors

• Crystal Tile 2 - Contains many tools for DS hacking, but is also helpful as a general tile editor. 🪟

Nintendo DS

• Nitro Studio 2 Deluxe - An all-in-one tool for editing music and sound effects in .sdat files. 🪟
• The Ultimate Nintendo DS Romhacking Guide - A thread on GBATemp that goes over basic DS romhacking. Note that it uses some outdated tools.

Game Boy Advance

• GBATEK - More than everything you'll need to know about the hardware and software of the GBA, DS, and (to an extent) the 3DS.

Advanced Concepts

• Binary translation - A Wikipedia page describing static binary translation, which is what static recompilations are.
• N64: Recompiled - A description of how recomps work for ROMs.
• Reverse Engineering - An article about reverse engineering and decompilation, which can be applied to ROMs.
• Data Representation - Harvard computer science course notes explaining how computers internally process data.

• Getting Started - Romhacking Dot Net's page for beginners looking to get started with the various subfields of romhacking.

Fundamental Concepts

• Big Endian vs. Little Endian - An article on the concept of endianness.
• Hexadecimal - A YouTube video explaining number bases, binary, and hexadecimal.
• Introduction to Programming Logic - A short description of the basic mindset behind programming logic.
• What is Debugging? - An explanation of debugging and the general debugging process.

Cheat Codes

• Action Replay Code Types - A document describing the parts and technical meanings of Action Replay codes.

*Metroid* series

• Metroid Construction - The hub for *Metroid* hacking and resources.
• Metroid Construction - The hub for *Metroid* hacking and resources.

*Mario* series

• Super Mario World Central - A community all about *Super Mario World*, but also may be relevant to other SNES hacking.
• New Super Mario Bros. Editor (NSMBE) - The main tool for modding *New Super Mario Bros.* (DS). 🪟
• New Super Mario Bros. Hacking Domain (NSMBHD) - A forum for discussing everything about *New Super Mario Bros.* (DS) romhacking.
• Super Mario World Central - A community all about *Super Mario World*, but also may be relevant to other SNES hacking.

*Doom* series

• Doomworld - A forum for *Doom* discussion, including documentation and help with creating mods.

*Pokémon* series

• A Beginners Guide to Hacking Gen 3 Pokémon Games With Decomps - A guide with resources for hacking Pokémon with decompilations.
• r/PokemonROMhacks - A large subreddit for discussing and making Pokémon romhacks.

*Super Mario 64*

• Pannenkoek - A *Super Mario 64* YouTuber who makes in-depth technical explainer videos about the game's workings.
• Kaze - A *Super Mario 64* YouTuber who creates mods and has optimized the entire source code.

68000

• 68000 Assembly Programming for the Sega Genesis - A detailed introduction to 68000 assembly.

PowerPC

• Basic ASM - An introduction to assembly using PowerPC.

Z80

• Romhacks Dot Org (RHDO) - A smaller, developing community similar to RHDN.
• Romhack Hispano - A romhacking community for Spanish speakers.
• GameHacking.org - A site dedicated to storing and creating cheat codes; includes a Discord server.
• r/romhacking - A small subreddit about creating and playing romhacks.