Here are some of the tools I learned about at SES SF 2013 in the Search Marketing Power Tools Set: SEO and PPC session with Bruce Clay and Kye Mou.

Broad Tools

Linking Tools

On-page analysis

SEM Keyword Research Tools

Other useful tools:

Kelsey Jones

Kelsey Jones

Founder/Chief Marketing Consultant at Six Stories
Kelsey Jones helps clients around the world grow their social media, content, and search marketing presence. She enjoys writing and consuming all kinds of content, both in digital and tattered paperback form.
Kelsey Jones
Kelsey Jones