/rhg/ - Notable hacks

http://www.pokecommunity.com/showthread.php?t=289571
>Yet Another FireRed Hack - introduces the Gen 4 phys/spec split, a newer, more difficult level curve and available Pokémon, new abilities and moves, etc. Essentially modernises FR.

http://www.pokecommunity.com/showthread.php?t=151068
>Azure Horizons - a really well polished, enjoyable FireRed hack set in a new region with a good story, great mapping and great scripting

http://www.2shared.com/file/hOSk1dY8/Pokemon_-_Vega_J_.html
>Vega - another very well polished FireRed hack set in a new region with loads of fakemon. It is sometimes very difficult and the language barrier doesn't help, but it is a fan favourite of many

http://www.pokecommunity.com/showthread.php?t=247696
>Blaze Black and Volt White - a "649" hack of BW which amps up the difficulty, level curve, Pokémon availability, and just generally improves the games and offers a new, fresh experience.

http://www.pokecommunity.com/showthread.php?t=290429
>Blaze Black 2 and Volt White 2 - the same as BB/VW, but for the BW sequels.

http://www.pokecommunity.com/showthread.php?t=202372
>Sienna - another polished, 8-gym hack following the plots of two Team Rocket factions in the new Voultan region. It stars some well-sprited fakemon and has great mapping and scripting.

http://www.pokecommunity.com/showthread.php?t=158324
>Light Platinum - a very unbalanced hack with great graphics and poor translation. This is quite the controversial hack but is popular nonetheless.

http://www.pokecommunity.com/showthread.php?t=183562
>Flora Sky - basically the same as Light Platinum, just different