Aseprite2Unity
Automatically import Aseprite files to your Unity projects
Background Warper (Earthbound BGs)
Image warping tool with Earthbound backgrounds to mess with.
GB SFX Generator
A tool for making authentic Game Boy sound effects
3DPixels
3D Model Pixelizer
Oxide Tracker
A chiptune music tracker featuring an envelope-based instrument editor for making your own 8-bit sounds.
Enginsito
It's not a tool, It's not a game, It's a toy.
GB Studio Background Text Generator
A tool to use GBS PNG font files to write directly to background images.
Bitmelo
An all-in-one editor for making pixel art games.
I-CHR
Turn pixel art into an NES ROM!
Zixel - Easy to use Tile Maker!
Easily create tileable tiles for your game!
FontSprite
Simple fontsprite editing with lots of functions
Waporware Modular
Modular synth toy
CryPixels
Procedural Pixel Art Generator
Game Boy color test utility
A utility for creating palettes directly on Game Boy hardware
RGBitsy
Use color images in your Bitsy game.
DanielX.net Paint Composer
Compose music, export to wav or mp3!
Octo
A Chip8 IDE
Chips
(ﾉ◕ヮ◕)ﾉ*:･ﾟ✧ Chiptune synthesizer!
Micro Game Maker
The Swiss army knife of 2D game creation!
Monochrome Spriter
Make retro, animated sprites!
LowRes NX
Program retro games in BASIC!
RPG Series Character Creator 8 Bit
4 - 8 Direction Character Creator for RPG Games.(alpha)
Dithering brushes for PaintToolSai
Technically brush textures, but that makes for a longer title
PX8 Fantasy Console
8-bit Fantasy Console