Pokemon Roaming Red is an expanded version of Pokemon Red with much more freedom.
Pokemon Scramble is a well-balanced hack with improvements that you need to play, it was hacked from Pokemon Red.
Pokemon DeadRed – Ready for a challenge? : Have you fully get prepared for Pokemon Deadred – a hack of Pokemon Red? Well then, we’ll get this one and see its potential.
Pokemon Tough Red is a hack of Pokemon Red. The author says this hack is implemented with the original story while added some new elements.
Pokemon Vicious Red is a hack of Pokemon Red. Welcome to the world of Pokemon! You were finally given the license of your Pokémon Trainer.