resourcepack-zip
There are 3 repositories under resourcepack-zip topic.
Speedy11CZ/mcrpx
MCRPX is a tool to extract files from Minecraft: Java Edition resource packs into selected directory. It can also bypass corrupted resource packs, used by servers to protect their resource packs.
CodeF53/PackXBR
A utility for automatic application of the XBR scaling algorithm to game textures.