There are 3 repositories under noclip topic.
A universal way to create a noclip mod in Unity games (Mono/IIL2CPP)
A Minecraft mod with a lot of cool features.
Script files for noclipping in Playdead's INSIDE game.
Noclip mod for the game Firewatch
It is a Garry's Mod addon that allows you to create anti-noclip fields. Players in these fields are unable to noclip.
Enhanced 'Debug Mode' for Shadow Tacticts: Blades of The Shogun
Three.js noclip camera controls that feel similar to minecraft creative mode
Exploration mod for Slime Rancher
Modified DLL to freely move the camera in Syberia 3.
Debug and Noclip mode for FAR: Lone Sails game