There are 2 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
Debug and Noclip mode for FAR: Lone Sails game
Modified DLL to freely move the camera in Syberia 3.