FFXV Websites
General FFXV
FFXV Link Pool - A more complete compilation of links others may contribute to.
Final Fantasy XV Wiki
FFXV Fan Kit - Official media including game videos/trailers, recorded interviews and information on various campaigns they've launched for the game (JP)
Brotherhood: FINAL FANTASY XV Official Anime Prologue ft backstories of the Noctis and the boys (JP, Subtitled Eng)
Parting Ways - A script of FFXV's immediate prologue ft. stories of Clarus, Cor, Captain Drautos, Iris & the Kingsglaive as well as Noctis & Co saying goodbye
Lore, Translations & Analysis
Vaer19's FFXV Datatool - A tool to compile, search, and cross-reference data from various official FFXV content
Full Lines FFXV - All lines and document files from within the game.
Spelldaggers - Eng & Jpn Scripts and Translations
The Lifestream FFXV - Lore, Translations and archived Fantheories
Calling4Glaives Deep Dives - Analysis, Lore and general Deep Dives
Artist Resources FFXV Official Art - Official artwork, screenshots and character references (JP)
Fansites LOKTON - A FFXV/Prompto Argentum Fanblog
THAT'S IT! THE UNOFFICIAL FFXV COMMUNITY COOKBOOK - 111 Recipes fans worked together to compile into a google site
Honey & Toast FFXV Cookbook - A cookbook compiled by fan 'Honey&Toast' (pdf form here)
Discords FFXV Book Club - A Server dedicated to hanging out, sharing and geeking out over FFXV fanworks https://discord.gg/95VQB6fgPb
Check out the FFXV Book Club community on Discord - hang out with 302 other members and enjoy free voice and text chat.
For Hearth & Home - A Kingsglaive Server https://discord.gg/VZkhXV2
Check out the For Hearth and Home community on Discord - hang out with 121 other members and enjoy free voice and text chat.
FFXV Official Discord - The Official Unofficial FFXV Server
The largest Final Fantasy XV Discord. Keep up with game news, find Comrades teammates & chat about all things FFXV/FF15! | 10037 members
Promptis - A Discord for Prompto & Noctis Shippers
Check out the Promptis community on Discord - hang out with 128 other members and enjoy free voice and text chat.
ffxv_kinkmeme - A community for anonymously suggesting FFXV writing prompts that others may find appealing to write (Despite the name these prompts can be gen and not ship related at all)
Can anybody think of any missing fansites or lore resource websites which may be missing from this list? The full constantly updated list is located here and if you don't want to comment on tumblr feel free to leave a logged in or anonymous comment on that post