Minecraft Java 1.17 Mods
Browse 15 free mods for Minecraft Java 1.17 — popular picks include KingdomsX, PlayerProgress, No Iron Golem Poppy Drops.
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KingdomsX
Battles for might, land and glory. A complex international land & team management plugin.
PlayerProgress
PlayerProgress is a Minecraft datapack that introduces a leveling system. Earn UP from activities like mining and combat to level up and gain new abilities and rewards.

No Iron Golem Poppy Drops
Makes iron golems drop only iron ingots and no poppies.
PySpigot
A Python scripting engine (plugin) for Minecraft servers running Bukkit or one of its forks (Spigot, Paper, etc.).
MobMoney
This plugin makes killing various mobs valuable for which you will receive money
ClanForge
Complete clan ecosystem with storage, economy, rankings and cross-server synchronization
DZEconomy
A practical multi-currency economy plugin for Paper, Spigot, Folia, and Purpur with Money, MobCoins, Gems, LuckPerms multipliers, combat tagging, and SQLite/MySQL storage.
Advanced API
AdvancedAPI provides very simple code, for example, ItemBuilder or SimpleInventory, which can be used to create things faster. ONLY FOR PLUGIN DEVELOPERS
UpgradeMyDog
A lightweight, configurable plugin that allows players to level up their pet wolves (dogs). Improve their health, damage, and speed to turn your loyal companion into a true ally.
Storage V3
Virtual Ore&MythicMobs Items Storage For Survial&RPG
Compostable
Survival friendly plugin that makes more things usable for the composter block, like rotten flesh and fish!
Chaos Engine
Chaos Engine adds events to the server (UFO, meteorite, glitch events, and others), custom enchantments, and careers. The plugin also includes a weapon system, cases, a casino, and much more!
SYSTEM SMP
System SMP is a premium Minecraft plugin designed for survival multiplayer servers. It adds unique features including small caps text formatting, tree felling mechanics, custom item displays, and an economy-based spawner mining system.

LBSpawners
Advanced stacked spawners
CreeperChestSave
Chests don't explode but blocks do.