What Alternative Plugins Can I Get To The Ones I Have Already That Use Less RAM Consumption

Hey, i was wondering what alternatives i can et to the plugins i already have so that my sever uses less ram consumtpion?
Thanks In Advance

Heres My Plugins:

BorderGuard
Fly-Without-Creative
Worldedit
LightDetector
CommandBook
Deadbolt
SecretSwitch
PermissionsEx
WorldGuard
ChatManager
BOSEconomy
SimpleRegionMarket
Jobs
Serversigns
AuthMe
WirelessRedstone
Vault
ForeverALoad
Chestshop

Anybody?

EDIT by Moderator: merged posts, please use the edit button instead of double posting.