Pokemon Tiberium is an amazing Pokemon Emerald Hack that is made for fun. All texts in the game are in English. However, this hack is still in process of developing.
Pokemon Rebirth is an awesome Pokemon Emerald Hack which is made by Link2999 for GBA Emulators. This game is still in process of developing.
Pokemon Aspera is a hack version of Pokemon Emerald. The main language is English. It is worth to download and play it.
Pokemon Crystal Shards is a Pokemon Hack that is based on Pokemon Emerald ROM. This hack is for those who love Pokemon Gold/Silver/Crystal Version on Game Boy Color.
Pokemon Crono is an awesome Hack of Pokemon Emerald. If you want a new game with the new Region, it is a good choice.