OnlySilver by Zot
OnlySilver ports the silver ore and its derivatives from SimpleOres 1.5.2_1 to the later versions of Minecraft.
OpMe by andrenoel
A command to toggle operator status and creative game mode for players you preauthorize in a config file. I like to play as a normal player but be easily opped when needed. For security, nothing can add anyone to the list from in-game.