There are so many SEO tools are available such as

- Keywords Suggestion Tool
- Link Builder tool
- Link Analysis Tools
- Search Engine Ranking Checkers
- Search Analytics Tools
- PPC Tools

Now a days SEO is most popular in the market. There are so many technique are exist in SEO such as

- Link Building,
- Forum Posting,
- Article Posting,
- Bookmarking,
- Directory submission.