Modules

For Players

Anytime Sleep — let players set their bed spawn point at any time of day
Chat Channels — players can join a private chat channel
EnderPearl Homes — players can teleport to their bed or spawn with Enderpearls
FancyName — picks a random name color for each player in chat to improve readability
Parties — players can create parties, which can be used with Claims
NetherCoords — calculates Nether portal locations
Player Invites — lets players whitelist their friends

Game Modes — convenience commands to switch game mode
Give Item — give items to players using a virtual inventory
Modify Item — modify common NBT properties of items, such as display name and lore
Spawns — commands to teleport to spawn and change spawn
Speed — commands to change flight and walk speed
Status — commands to heal, hurt, and satiate
Teleports — commands to teleport players, with support for cross-world teleportation and offline players
View Inventory — commands to view and modify other players' inventories, even if they are offline
Moderator Mode — lets moderators enter a special moderator mode that temporarily stashes their real inventory and keeps their previous location so that they can later return to both later when they're done moderating

BeanShell — execute BeanShell code via console
Clock — view 5 second, 30 second, and 5 min tick/s averages
ChunkLoader Tickets — commands to release chunk loader ticks
Chunk Load Limiter — prevent certain mods from loading chunks implicitly, in order to reduce chunk load churn
Chunk Profiler — identifies which mods are causing implicit chunk loads
Crash Guard — intercepts would-be crashes that would bring down the server and lets you customize the response
Dictator — make certain tile entities and entities tick more infrequently
Exporter — export loaded chunk, entity, tile entity, and other data to CSV files
Metrics — submits metrics (tick rate, mob counts, etc.) to a Graphite server and optionally exposes these metrics as MBeans over JMX
SpecificProfiler — measures how long tick entities and entities take to tick
Uptime — command to view how long the server has been up
Watchdog — detects when the server has stalled and provides options to deal with the problem

BackTrack — keeps a log of changes that a player has made to the world (block breaks, block places, etc.) and allows for search, rollback and replay of this data
Bans — cross-server bans
Broadcast — command to broadcast a message to all users
Claims — lets players claim certain chunks under their name, which can provide rudimentary protection and owner data for other modules
Command Filter — filters which commands can be used and when (in console only, etc.)
Item Blacklist — removes matching items from a player's inventory
Users — keeps a cross-server database of all members
Operator Check — can be configured to remove players' op status on join
Plume Commands — commands to reload Plume configuration
Restarts — server shutdown or restart countdown
Sensible Numbers — increase or reduce the number of mobs spawned
Welcome Message — configurable message shown when a player joins
World Border — limits players to a specific area

Debugging Listener — prints debugging messages whenever a known protection-related event is triggered
Potential Spawn Validator — disables mob spawns with an invalid probability, caused by some mods
Report File Writer — writes reports generated by other modules (such as the profilers) to disk
Server Breaker — test commands to break the current server