CodeWalker has different softwares, the ones I use the most are the RPF explorer and the map editor.
OpenIV
This app is the most famous gta files explorer, it is use to open .RPF files, visualize .ydd, .ytd, .yft, .ydr files and also as a folder explorer
Zmodeler3
This is a 3d modeling software.
It has integrated features that are usefull when you are a gta mods maker.
Blender
Blender is the 3d modeling software used by the most of videogames developers.
It is also used to make animations an so much things.
Visual Stdio Code
I use Visual Studio Code to modify game archives like _resource.lua, handlings and _manifest.ymf.
This archives are used in all add-on archives like in cars, mlos and clothes.
Photoshop
Who don’t know photoshop?
It is the most famous photo editor, it is used by tons of proffesionals in a ton of different works.