Here are some websites I found that helps me a lot in my journey in Eorzea, I hope it helps you guys as well :)

FFXIV Guild.: General information on classes, relics, etc.

FFXIV GamerEscape: FFXIV Database.

FFXIVdb: Another FFXIV Database.

FFIX Eorzea time: This is a source for what times the miners/gatherers can access certain Unspoiled deposits.

Hopefully I can find more :)