Community Mods

https://github.com/pret/pokeemerald/wiki/Tutorials

https://github.com/TeamAquasHideout/Team-Aquas-Asset-Repo/wiki/Feature-Branches

UI

Unbound Quest Menu Docs (https://github.com/PokemonSanFran/pokeemerald/wiki/Unbound-Quest-Menu)
Unbound Quest Icons Docs (https://github.com/lienne/pokeemerald-expansion/wiki/Unbound-Quest-Icons)
https://github.com/pret/pokeemerald/wiki/Reset-Legendaries-When-Beating-Elite-Four
https://github.com/pret/pokeemerald/wiki/Shop-Items-By-Badge-Count (RHH)
https://github.com/TeamAquasHideout/Team-Aquas-Asset-Repo/wiki/How-to-Change-the-Title-Screen-for-pokeemerald-(and-expansion)
https://github.com/TeamAquasHideout/Team-Aquas-Asset-Repo/wiki/Generating-Title-Screen-Text-Graphic
https://www.pokecommunity.com/threads/simple-modifications-directory.416647/page-25#post-10780812
https://www.pokecommunity.com/threads/simple-modifications-directory.416647/page-17#post-104493
https://www.pokecommunity.com/threads/simple-modifications-directory.416647/page-11#post-10266385
https://www.pokecommunity.com/threads/simple-modifications-directory.416647/page-3#post-10127351
https://github.com/pret/pokeemerald/wiki/Make-Key-Items-That-Cannot-Be-Used-In-The-Field-Not-Show-A-Use-or-Register-Option
https://github.com/iriv24/pokeemerald-expansion/tree/original_tx_registered_items_menu
https://www.pokecommunity.com/threads/more-bag-pockets.424360/

Items

https://www.pokecommunity.com/showpost.php?p=10217718&postcount=172
https://www.pokecommunity.com/threads/simple-modifications-directory.416647/page-5#post-10164065
https://github.com/PokemonSanFran/pokeemerald/wiki/QoL-Field-Moves
https://www.pokecommunity.com/showpost.php?p=10349397&postcount=258
https://www.pokecommunity.com/threads/simple-modifications-directory.416647/page-15#post-10401331
https://www.pokecommunity.com/showpost.php?p=10182590&postcount=117
https://github.com/pret/pokeemerald/wiki/Item-Automatically-Goes-to-PC-if-Bag-is-Full
https://github.com/pret/pokeemerald/wiki/Make-the-Bag-Able-to-Hold-120-Items-Instead-of-30 (RHH)
https://github.com/TeamAquasHideout/Team-Aquas-Asset-Repo/wiki/Making-Hidden-Items-Respawn-Everyday
https://github.com/pret/pokeemerald/wiki/Rock-Smash-Gives-Items
https://github.com/rayrobdod/pokeemerald/tree/technique_manual

Scripting

https://www.pokecommunity.com/showpost.php?p=10193109
https://github.com/pret/pokeemerald/wiki/Daily-Random-Egg
https://github.com/TeamAquasHideout/Team-Aquas-Asset-Repo/wiki/Time-based-Nurse-Joy-greetings
https://github.com/pret/pokeemerald/wiki/Rewards-For-Beating-Elite-Four-With-And-Owning-Specific-Pokemon-by-scolandrea
https://www.pokecommunity.com/showpost.php?p=10450677
https://github.com/pret/pokeemerald/wiki/Stair-Warps
https://www.pokecommunity.com/showpost.php?p=10182839&postcount=119
https://github.com/pret/pokeemerald/wiki/Allow-Feebas-to-be-caught-on-any-Valid-Fishing-Spot-in-Route-119-rather-than-only-Three
https://github.com/pret/pokeemerald/wiki/All-Trees-Permanently-Get-Cut
https://github.com/pret/pokeemerald/wiki/Make-Mirage-Island-Appear-with-Pokemon-in-party-or-a-flag-being-set
https://github.com/TeamAquasHideout/Team-Aquas-Asset-Repo/wiki/Put-random-birds-on-the-roofs-of-your-towns! (use OWE)
https://github.com/TeamAquasHideout/Team-Aquas-Asset-Repo/wiki/Fish-are-always-hooked,-and-cant-get-away
https://www.pokecommunity.com/threads/eon-flute-soaring.422107/

Graphics

FRLG Map Preview Docs (in base expansion) (https://github.com/Bivurnum/decomps-resources/wiki/FRLG-Map-Previews)
https://github.com/pret/pokeemerald/wiki/Button-Press-to-Skip-Copyright-Screen
https://www.pokecommunity.com/threads/simple-modifications-directory.416647/page-21#post-10566704
https://github.com/pret/pokeemerald/wiki/Make-the-Person-in-the-Intro-Match-the-the-Save-File
https://github.com/rh-hideout/pokeemerald-expansion/compare/master...surskitty:pokeemerald:surfable
https://www.pokecommunity.com/showthread.php?p=10533514#post10533514
https://github.com/pret/pokeemerald/wiki/RoamersPlus-%E2%80%90-multiple-Roamers-at-once/
https://github.com/pret/pokeemerald/wiki/Roamers-On-Map-Show-A-Message
https://www.pokecommunity.com/showpost.php?p=10099773
https://www.pokecommunity.com/showpost.php?p=10100138
https://github.com/wiz1989/pokeemerald-expansion-master/tree/castform_weather_change
[DESCOPED] https://github.com/Kasenn/pokeemerald-expansion-kasen/tree/battle-dns
https://github.com/BelialClover/pokeemerald/tree/seasons
https://github.com/KittyPBoxx/pokeemerald/tree/alpha-blended-top-layer-maps

Outfits/Character Customization

Prefer hat/shirt/pants separate options
https://github.com/mudskipper13/pokeemerald/tree/feature/outfits-system-rhh
https://github.com/kyphii/pokeemerald/tree/feature/dynpal