Reminiscing about QW - it was astounishing how much some level of cheating was accepted

I'm strictly talking 90s now, but oh the times were so different. It's kind of crazy as most of this stuff would be considered 100% cheating now IF the game does not natively offer the option, but modding all of these into the game was the first thing you did to become competitive AND it was acceptable.

Things I remember :

• Neon player models
• Alternative crosshairs
• Alternate lightning gun beams (i.e. thin line for better visibility)
• Different models for rockets to make them slimmer
• Model to remove the RL/GL smoke trail
• Skybox removers
• Changed the model armors, backpacks and ammo pickups to have neon colors
• Questionable but was used a lot : automatic .wav timers to warn you about upcoming armor spawn, etc

It's interesting to see how much of these things got natively adopted in later versions.
What else was popular in your time?