Sometimes it seems like SEO tools are a dime a dozen these days. It’s hard to know which ones are worthwhile until you’ve tried them all. Traffic Travis is one of the better tools we’ve seen. It features everything from a keyword finder to a page analyzer, and it has an easy-to-use interface to boot. And unlike a lot of SEO software that’s of this caliber, Traffic Travis is free.Next, tag clouds are great for a lot of reasons, and there’s a lot of ways you can use one. Wordle is a free online tool that lets you create a tag or word cloud out of any text you throw at it. The cloud then displays all the words from the text based on how frequently that word appears. Plus, you can easily display the words in different fonts and formats.

StomperNet faculty member David Bullock is always thinking about sophisticated ways you can get more out of your ongoing keyword research. In “A New Definition for Keywords,” he suggests that you should be looking at the “conversations” of search phrases rather than just current search volume. According to Dave, a conversation is the history that a keyword has with a particular subject. For more on this intriguing idea, check his website at davidbullock.com.

Finally, as faithful viewers of the Free Line know, a good showing on search engines such as Google and Yahoo can do wonders for your business. As important as search engines are, however, it is only a small portion of any good web marketing campaign. Here are three great tools to help you build presence in places other than Google:

Archaeologist – Archaeologist is a new web application that lets you analyze and study keywords and phrases found in Digg. Each keyword is presented in a convenient time line layout, allowing you track the popularity of said word or phrase over time.

Twello – Simply put, Twello is the “Yellow Pages” for Twitter. Each user and post are searchable by both name and subject.

Facebook Lexicon – A Facebook widget that monitors the most popular words within the service. Each result can be viewed individually or paired with a similar keyword.

It seems like there are five or six more Web 2.0 companies, tools and websites every single day. To give you an idea of the scope of social media proliferation, SimpleSpark created a video that flashes all the Web 2.0 company logos they could find into one short video. And that would be 5,000. They go fast, but it’s pretty cool if you have 333 seconds to kill.