Auctions
Athozus

Adds ingame auctions

Customiserver
1faco

Adds colored chat and custom nametags

Global Market
AFCM

Market command

Bounty
csirolli

Place bounties on players

LocalChat
qPexLegendary

Adds local and global chat

Autograph Mod
Jo5629_

Autograph Mod

Anti Lava Area
1F616EMO

give admin power to anti lava in some region.

player actions
Giga_M

shows the actions of a player

Drop The Caps
cheapie

Kicks players that spew all-caps messages

faction items
Giga_M

add some items to be used as prizes for special events or player achievements

GiftBox
sorcerykid

An assortment user-customizable presents for special occasions

Shopping
TX_Miner

A shopping mod for Jean's Economy (By TX_Miner aka Xeno333)

Height Limit
SkyBuilder1717

Adds height limit for servers.

PlayerInfo
niwla23

Players can set their info and others can see it

Time and Date Stamps
Bob64

This mod overrides the default chat format so that it also contains the date and time that the message was sent.

Mining Game
chaosomnium

A simple base game where you mine mud for ores probabilistically in space.