What are the tools to use for SEO?

[sneha079]

New Tools Every SEO Should Check Out :geek:
Ontolo: An Expert Link Builder's Dream
SEO Gadget's Keyword Research Beta
Trunk.ly: Terrific Tracking for Your Twitter Links
Markup.io: Flawlessly Simple Screenshots + Notes
Content Optimizer: Leveraging LDA for Keyword Suggestions
Andrew Wright's + Ben Huff's SERPs Analysis Worksheets (MS Excel)