Awesome
gbdk-lib-extension
A small set of sources and tools for the Gameboy Development Kit by Michael Hope
It includes a Java application to export images to sprites and background in gbdk and some C sources, adding some useful functions to the gbdk library.
FEATURES
It's divided in 2 components:
TILE EDITOR:
-Export png\bmp\jpeg\tiff images to efficient assembly and C code for GBDK.
-Create maps and tileset starting from an image.
-Compress tiles in an RLE-like format
C LIBRARY:
-Various functions to setup metasprites. Metasprites are sets of sprites that can be moved all together to simulate the existance a bigger sprite.
-An improved set_bkg_data to load RLE compressed tilesets.
Here's a sample game that uses this library: https://github.com/ProGM/doctorhow