MobHunting, get rewarded from killing mobs https://www.spigotmc.org/resources/mobhunting.3582/
BagOfGold (drops bag of gold when someone killed a mob, this is linked with MobHunting) https://www.spigotmc.org/resources/bagofgold.49332/
OreCrops (Plant and grow your very own orecrops) https://www.spigotmc.org/resources/orecrops-1-13-1-14-plugin.68205/
AdvancedOreGenerator (Because CustomOreGen hasn't updated) https://www.spigotmc.org/resources/advancedoregenerator.51153/
All work on 1.14.x