Hi Dan,
Just as Cristea George Cristian said, there are tools everywhere on the internet. The question about which are the best marketing tools is not that easy to answer as first we would have to consider the tools within the marketing tools.
There are three main groups of tools for internet marketing: Customer identification tools, reach tools and relationship management tools.
In the first group, customer identification, we have:
- Keywords tools such as AdWords
- Market research tools for information, segmentation and trends of the market
- Marketing research tools to gather information about preferences, attitudes and behaviors of the consumer
The second group, the reach tools, includes:
- Search Engine Marketing (SMM) including PPC services, Search Engine Optimization (SEO)
- Social Media Marketing (SMM), Social Media Optimization (SMO)
And last, but not least, the relationship management tools such as:
- Promotions
- Email marketing
- CRM systems
So it all depends on the Marketing Strategy and the type of campaign a company decides to implement.
Are you looking for something more specific for a certain area or purpose, maybe?