People and credit are listed in no particular order.

Mike Chopswil

csv data for Feats, Spells, Afflications, and Magic Items

Blahness98

Classes/Archetypes (none currently added)
Spells (none currently added

https://game-icons.net/

For providing an excellent resource for making free customized icons. The icons used from their site can be accredited to the following artists:

DarkZaitzev (https://www.deviantart.com/darkzaitzev) under CC BY 3.0
Delapouite (https://delapouite.com/) under CC BY 3.0
GeneralAce135 under CC BY 3.0
Lorc (https://lorcblog.blogspot.com/) under CC BY 3.0
Skoll under CC BY 3.0

Esalarc

Traits

dllewell

Kingdom Building

Kronos

Helped with Feats. Found and created all missing entries for traits. Created buffs database. Contributed time and energy for deities, and generally helped with various aspects.

Raabb

added images to feats, found missing entries

Fair Strides (Fair Strides#2148)

Shared Animal Companion class and features

ChaosCowboy

contibuted with elephant in the room

Websterguy

Various contributions to compendiums, formulas and class for companions and eidolons

apetina, david (aka claudekennilol), moorepants, ACorania, mana+2

Various Contributions to the Compendiums and general help with questions and problems.

Vormav (Vormav#0464)

added Drug items, and other Contributions.

llneo12

added images to feats, and helped with linking prestige classes

Zarek (Zarek#4201)

Added contribution and changes to items
Created Git Action to allow for fast and easy updating and release
Added the features to allow for compendium splitting, enabling PR for individual changes
Added script to unpack/repack files for release
Updated details regarding how to contribute now that Let's Contribute is retired