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What sort of marketing are you looking to achieve? If you are looking to build an email list or newsletter than services like mailchimp are good. If you are doing social media marketing then check out Hootsuite or Buffer.
If you are looking to market a small business by building a very strong online presence & reputation then take a look at My Presences. This is our new Australian based service just about to enter the market that will help you market your business online on hundreds of different services and then helps you keep on top of everything in minutes a day or week.
Good luck.