The server currently runs on PaperMC 1.20.4, which is an optimized version of Spigot (put simply). The plugins and datapacks below have been added for additional features that add value to the overall server experience.
Dynmap - Mapping and web chat capabilities
SMP Spectator Mode - Easily allow spectator mode (use /s to switch between Survival and Spectator)
DiscordWhitelister - Simplify the server whitelisting process
LuckPerms - GUI permissions manager
Shopkeepers - For the "bookstore"
VanillaEnchants - Enable higher levels of vanilla enchantments through the normal combining mechanic, and also God-Armor
Below datapacks and tweaks from VanillaTweaks.
AFK Display - Greys out afk player names
Anti Creeper Grief - Creepers hurt neither you nor blocks
Anti Ghast Grief - Ghast fireballs can blow you up, but won't break blocks
Coordinates HUD - Simple overlay of x/y/z location and in-game time. Activate by running the command /trigger ch_toggle
Double Shulker Shells - Shulkers always drop both shells when killed
Multiplayer Sleep - Reduce the number of players required for server to skip the night
More Mob Heads - Mobs will drop heads occasionally when killed
Rotten flesh can be smelted to turn it into leather
Notch Apples - 8 gold blocks around an apple
Wool can be de-crafted into string
You can re-dye all dyeable blocks