Content marketing is a burgeoning field and unless you've been living under some kind of virtual rock, this increasingly popular discipline has probably caught your attention.

Despite the growing need for quality content to appease search engines, engage website visitors and attract those all-important inbound links, not all organisations have the resources, inclination or budget to churn out content like a publishing house - and that's OK.

For those of you in this situation, we've put together a handy guide that'll help you track down the best content marketing services on a local, national and international level.