If you have any useful threads not listed here to add, feel free to report it to a mod.
Legion Weak Auras:
Tracking Well of Soul's souls 1
Tracking Well of Soul's souls 2
Raids & Dungeons
Boss guides & Tactics
Emerald Nightmare
Heroic guide from tank PoV
Another guide
Useful Auras/Notifications
Dungeons
Mythic+ tips
General topics
Post your raiding videos
Tools to help to plan a raid & Addons
Ideas for attendance tracking google sheets
WoWRoster raid planner for guild
Dungeon help
Miscellanious
Amazing Vanilla/BC/Raiding Experiences Stories
Cheat sheet for Legion