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[ROM HACKING]

Notable ROM hacks: http://pastebin.com/GfJ9zhqx
Getting started on your own hack: http://pastebin.com/fjGZfMzP

Gen 4 - 6 Hack Tools:
http://pastebin.com/WvTzcdPR

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[ESSENTIALS]

Essentials Engines:
http://pastebin.com/G5PdvaGD

Essentials Wiki: http://pokemonessentials.wikia.com/wiki/Pok%C3%A9mon_Essentials_Wiki
RMXP Tilesets: http://www.mediafire.com/download/sd99pug37y4v4se/Ziddy%27s+DS+Style+Tilesets+RMXP+.rar
http://imgur.com/a/CiudS (WIP Gen 5 tiles)

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[SITES FOR SHARING GAMES]
http://www.pokecommunity.com/ (better for ROM hacks)
http://reliccastle.com/forums/ (better for Essentials games)