Pokemon Oro Sole is not an English ROM Hack but it is a quality game for you if you know Italian.
Pokemon Omega is a wonderful hack from Mac_Mini. Although it is based on Pokemon Ruby, it still owns a lot of new features to enjoy.
Pokemon Marble is really a professional Pokemon Hack Game. If you often play Hack ROMs, you will know Pokemon Quartz and Baro.
Pokemon Liquid Ocean is an amazing Pokemon ROM Hack of Pokemon Fire Red. You play in the new region Soala.
Pokemon Liquid Crystal is a hack based on Pokemon Fire Red ROM but it is truly a wonderful remake of GBC Pokemon Crystal.