Yes. None however which would effect how night works. If you want a full list:
Cannons
Death Chest
Dynmap
Essentials (core, chat and group manager)
Fireworks
iconomy
Jail
Lift-13
LWC
Minecars
Minecraft RTK Plugin
Multi Inventory
Multiverse (core, Nether Portals and portals)
Safe creeper Simple Spawn
Teleport Suite
Simple Spawn
Vault
World edit
Wow... I should probably get rid of some... Hope this helps. Sorry it's so long!