The Quake Army Knife (QuArK) is a versatile editor designed for modifying Quake and a wide range of other games that utilize similar engines. Supporting 41 different games across 5 engines, QuArK is fully compatible with all expansions and mods. With QuArK, you can intuitively edit maps, character models, and creatures, as well as import custom sounds and textures. The software also allows you to create and modify .pak and .pk3 files, and import .bsp files to manage entities. Compatible games include Quake 1, Hexen 2, Quake 2, Heretic 2, Half-Life, and many more. QuArK is free, open-source, and user-friendly, featuring extensive tutorials and videos to help you get creative with your favorite first-person shooters.
Overall, I think QuArK is decent. There’s a lot of good info, especially in first aid. However, the interface could be more intuitive; I got lost sometimes. Still, it has potential and could be helpful when needed!