Luna/Lunade/AViewFromTheTop:
 - Lead developer & gameplay designer & idea generator (not gonna take the time to explain everything I did.)
 - Worldgen (don't forget Soro's worldgen, too!)
 - Crab entity, Reach Boost (2.2-2.4.3), and Wind particle textures.
 - Sounds (2.2 onwards.)
 - QA.
 - Etc., etc.

Treetrain1:
 - Porting the mod to newer Minecraft versions (THANK YOU TREE.)
 - Bug fixer for more complex/technical issues.
 - Gradle work and fixes.
 - Lots of mixin help.
 - Firefly & Jellyfish AI.
 - QA.
 - Tons of other fixes and tweaks and reorganization, etc., etc.
 - He's a genius.

Soro:
 - Initial biome additions.
 - Most new Tree generation.
 - Biome ideas (Temperate Rainforest, Mixed Forest, Oasis.)
 - Beta Beaches.
 - Water Pools generating near Rivers.
 - Scorched Sand concept.
 - Baobab Nuts.

Contributors:

Merp:
 - Lead texture artist prior to 2.3.
 - Sound designer prior to 2.2.
 - Occasional gameplay designer & feedback.

 Zhen:
  - Retextured all Baobab Nut textures in 2.4.
  - Retextured all Glory of the Snow textures in 2.4.
  - Retextured all Milkweed block textures in 2.4.
  - Updated Flowering Lily Pad textures in 2.4.3.
  - Updated the Milkweed Pod texture in 2.4.3.
  - Retextured the entire Cypress set in 2.4.3.
  - Retextured the Reach Boost icon in 2.4.4.
  - Made the Cracked & Mossy Mud Bricks textures.

Enri:
 - Italian translation.
 - Came up with Jellyfish being in Shipwreck Chests.
 - Crab in Bucket, Ostrich, Ostrich Egg, Scorched, and Geyser textures.

voxelotl:
 - Scorched Eye and Fermented Scorched Eye textures.
 - Scorching effect icon.
 - Retextured Null Blocks in 2.4.3.

LudoCrypt:
 - New music.

LiukRast:
 - Baobab Tree generation.

Xfrtrex:
 - Prickly Pear and Tumbleweed ideas.
 - Came up with Firework Rockets being impacted by the wind.

JarethTheRad:
 - Structure assistance.

zozozrob_:
 - Cattail textures & occasional concept artist for a short time.

Xicad/Emma:
 - Echo Glass concept.
 - Consistently fantastic feedback!! An absolute treasure to have around.

Sculk Analyzer:
 - Sculk Echoer concept & inspiration.

Shadownite64:
 - Ostrich concept.
 - Inbred Ostrich sound suggestions.

SaishoVibes:
 - Initial configs.

embeddedt:
 - Helped set up Snowlogged rendering with Embeddium.
 - Pointed towards LevelRenderer for making Clouds move instead of using individual Mixins per-renderer.
 - Guidance with setting up much better fluid rendering for Mesoglea.

noah1510:
 - Fixed a crash relating to Sculk during worldgen.

Fourmisain:
 - Updated 1.19.2 to work with MixinExtras/Fabric Loader 0.15+.

Soulfate24:
 - Provided an improved Hollowed Log model for 2.4.3 that fixes the incorrect breaking texture and avoids a bug with texture misalignment.

Rebel459
 - Revamped music pools in 2.4.5.

wet.noodle/Ashlyn
 - Suggested adding Reach Boost to Beacons.
 - Pointed out the inconsistency in dye recipes between Sunflowers and Datura.

Osmiooo:
 - French translation.

nekkok:
 - Spanish translation.

unroman:
 - Ukranian translation.

mayonaka8478:
 - Japanese translation.

Moonisky:
 - Chinese translation.

Ostrich Sounds:
Most sounds are edited and taken from Sonddogs' "Rob Nokes Sound Library" on avosound.com, used with a purchased license per track.
https://xeno-canto.org/845946
https://xeno-canto.org/845937
https://xeno-canto.org/845936
https://freesound.org/people/monosfera/sounds/571540/
https://freesound.org/people/Radaral/sounds/564071/
https://freesound.org/people/annadnewby/sounds/565604/
https://freesound.org/people/SieuAmThanh/sounds/546291/
https://freesound.org/people/cognito%20perceptu/sounds/17922/
https://freesound.org/people/abstraktgeneriert/sounds/348944/
https://freesound.org/people/Emmalyons1/sounds/594176/
https://freesound.org/people/julius_galla/sounds/434893/
https://freesound.org/people/lukabea/sounds/660471/
https://freesound.org/people/Zott820/sounds/655706/
https://freesound.org/people/mhc/sounds/102782/
https://freesound.org/people/Greg_Surr/sounds/590169/
https://freesound.org/people/pigeonfriend/sounds/384065/
https://freesound.org/people/HerbertBoland/sounds/29695/
https://freesound.org/people/ChrisReierson/sounds/433749/
https://freesound.org/people/Ezcah/sounds/243715/
Additional sound effects were taken and edited from Minecraft itself.

Geyser/Magmatic Caves Sounds:
https://freesound.org/people/hdrck16/sounds/135010/
https://freesound.org/people/jiza529/sounds/184572/
https://freesound.org/people/SmirnoffLulo/sounds/585864/
https://freesound.org/people/DanielGod/sounds/719560/
https://freesound.org/people/n-lerche/sounds/459618/
https://freesound.org/people/unfa/sounds/174500/
https://freesound.org/people/Ezcah/sounds/248296/
https://freesound.org/people/WaltGerhard/sounds/268182/
https://freesound.org/people/hokstnator/sounds/151196/
https://freesound.org/people/humanoide9000/sounds/441835/
https://freesound.org/people/Anton/sounds/105293/
https://freesound.org/people/InspectorJ/sounds/398711/
https://freesound.org/people/Benboncan/sounds/113701/
https://freesound.org/people/hanstimm/sounds/256869/
https://freesound.org/people/junggle/sounds/274068/
https://freesound.org/people/Fission9/sounds/474850/
https://freesound.org/people/ilmari_freesound/sounds/663183/
https://freesound.org/people/AugustSandberg/sounds/677716/

Frozen Caves Sounds:
https://freesound.org/people/nlux/sounds/620967/
https://freesound.org/people/radian/sounds/62982/
https://freesound.org/people/Anthousai/sounds/398496/
https://freesound.org/people/giddster/sounds/437336/
https://freesound.org/people/Glitchedtones/sounds/380248/
https://freesound.org/people/SDLx/sounds/211163/
https://freesound.org/people/j_p_higgins/sounds/262634/
https://freesound.org/people/dheming/sounds/268023/
https://freesound.org/people/felix.blume/sounds/646589/

Unfortunately I haven't been able to dig up the sources for Crab sounds as I've only been keeping track of these sorts of things since 2.3.
However, they all originate from freesound.org with some Minecraft sounds mixed in.
