Item description:

dsZip is a handy utility to compress and decompress .nds files directly on the Nintendo DS. This way it is possible to store many more homebrew applications (or whatever floats your boat!) on a memory card than possible when using normal files, and decompress them only when you really want to use them.

The project is based on the GPL'd gzip source code (version 1.24). It uses the devKitPro build tool and libfat to access the memory device.

BIG BOLD NOTE: this is pre-alpha quality code. It might work, or not. It might fail in silent and subtle ways. It might destroy your console, or it might eat your data. Use it at your own risk, and do not complain if something goes wrong. You've been warned.
dsZip is provided without any warranty. Really.

What works:
The gzip decompressor should be OK (tested with different compressed file sizes, up to 128 MB).