MarketMeSuite is a Tweetdeck alternative with many additional features that make it useful for marketing. Now we are not talking about mass marketing here, we are taking about running selective marketing campaigns.
To pick just one great feature, selective personalized reply campaigns. You can setup and save searches for people in a location or within a radius of a location who tweet about specific topics and manually reply to them with custom pre saved responses.
Disclosure I help Market Me Suite because I think they are awesome.