Can someone help me with addons?

[Nicholaes]

I can't seem to find a necrosis addon that works also would like a kind of focus addon? And anything pvp related I guess or an overall addon pack that is helpful please

[zerf]

Focus frame addon: http://addons.us.to/addon/classicfocus
For dot tracking I suggest DoTimer: http://addons.us.to/addon/dotimer

Other than that, ShardAce is nice for warlock specific things: http://addons.us.to/addon/shardace