To all resource pack makers: in 1.13 pre-3 the folders for block and item textures are renamed to "block" and "item". And model names in blockstates now require "block/". Enjoy rewriting all
Jehkoba's Fantasy Resource Pack 1.13 - minecraft-resourcepacks.com
Bare Bones Texture Pack 1.19, 1.19.4 → 1.18.2 - Download
Default Improved Resource pack for Minecraft 1.13
Classic Alternative Resource Pack 1.13.2, 1.12.2 - 9Minecraft.Net
Minipack Resource Pack for Minecraft 1.13.2 | MinecraftSix