Customer Relationship Management: Your marketing team requires a central repository where it can link campaigns to leads, contacts and opportunities as part of the 360-degree view of your customer. See Zoho CRM.
Blog: Need to share post your blog as well as have a centralized location to keep your blog files stored and backed-up online? See Zoho Writer.
Document Management and Sharing: Centralize your marketing collateral but not just that - allow everyone on your team to comment and collaborate on the documents in one central wiki site: Zoho Wiki.