JoinLeave
Configurable Join & Leave Messages
You can add chatcolors
Provides 2 placeholders (%player% & %online%)
You can also turn off the messages if you would like to do so

Config.yml

# Placeholders:
# %player% - Returns player's username
# %online% - Returns how many player's are currently online

joinMessage: "&a%player% &7joined the server!" #set to "" to have no join message
quitMessage: "&c%player% &7left the server!" #set to "" to have no join message