GimmeBalance

Features include:

• In-combat restrictions
• Combat log prevention
• Item cooldowns
• Potion duration/strength modification
• Mob loot items drop rate
• XP gain modification
• Item durability modification
• Crafting/brewing/enchanting restrictions

Soft dependencies (not required)

ProtocolLib - https://www.spigotmc.org/resources/protocollib.1997/

For action bar messages instead of chat.

EssentialsX - https://www.spigotmc.org/resources/essentialsx.9089/

This plugin supports spawn points set by EssentialsX when reseting a player that was killed after combat logging.

Vault - https://www.spigotmc.org/resources/vault.34315/

Same as above but for permissions spawn points.