Warhammer 40,000 41st Millennium Edition
Warhammer 40,000 41st Millennium Edition (not to be confused with 42nd Millennium Edition) is a fan made edition of 40K seeking to be the best of all editions of 40k mainly 5th (In fact it was originally called 5.5). 41st was started in 2019 and aims to make a version of 40k that closer resembles the older editions with some bits and pieces from all of them as well as add new factions (Some lore friendly some...not).
Warhammer 40,000 41st Millennium Edition Core Rules
Google Drive for all of the Books There's a fair few supplements here EG Titans and HH units for Marines and Chaos Marines
Factions
Imperium
Adeptus Arbites Adeptus Custodes Adeptus Mechanicus Assassins Squats Rouge Traders Imperial Knights
Inquisition
Daemon Hunters/Grey Knights Witch Hunters/Sisters of Battle
=== Imperial Guard === Catachans Death Korps of Krieg Grande Armée Tanith First and Only Tempestus Scions Valhallans
=== Space Marines === Primaris Space Marines Black Templars Blood Angels Blood Ravens Dark Angels Death Watch Imperial Fists Iron Hands Space Wolves Ultra Marines
Chaos
Daemons of Chaos Chaos Knights Dark Mechanicum Lost and the Damned/Renegades and Heretics
=== Chaos Space Marines === Death Guard Emperor's Children Iron Warriors Thousand Sons World Eaters
Xenos
Eldar
Eldar Craftworlds Eldar Corsairs Eldar Exodites Harlequins Dark Eldar Ynnari
=== Tyranids === Genestealer Cults
=== Orks === Grot Revolushunaries Ork Dread-Mob