Have made a list of Search Engine Marketing tools

1. Keyword Suggestion Tool

1.1 Yahoo! Keyword Selector Tool
(http://inventory.overture.com/d/searchinventory/suggestion/)

1.2 Google AdWords Keyword Tool
(https://adwords.google.com/select/KeywordToolExternal)

1.3 WordTracker
(http://www.wordtracker.com/)

1.4 Digital Point
(http://www.digitalpoint.com/tools/suggestion/)

2. Class C Checker

3. URL Rewriting Tool

http://www.webconfs.com/url-rewriting-tool.php
Create Apache Mod-Rewrite Code to change Dynamic URLs to Static URLs

4. Backlink Check Tool

http://www.webuildpages.com/neat-o/
Show the anchor text of your backlinks

5. Bad Neighborhood Checker

http://www.bad-neighborhood.com/
Check if your link partner is considered Bad Neighborhood

6. Live PageRank

http://livepr.raketforskning.com/
Check PageRank from 78 of Google Data Centers

7. Google Datacenter Watch Tool

8. Advanced Google Search Methods

http://www.algotech.dk/googlesearches.asp
Search in Google with different methods such as allintitle, allinurl, allinanchor, allintext, site, define, etc.

9. Keyword Competition Analyzer

10. Search Engine Index Check

11. Site Wide Cache Check

12. Page Rank Search

http://www.prsearch.net/index.php
Show Google Search Results with PageRank, Inbound Links, Similar Pages and Cached Pages

13. PageRank Search Prog

http://www.seochat.com/seo-tools/pagerank-search/
Show Google Search Results with PageRanks. You can also check Meta Tags, Inbound Links, Analyze Links, Cached Version and Similar Web Sites

14. Robots.txt Generator

15. Robots.txt Syntax Checker

16. Copyscape

http://www.copyscape.com/
See who copies your web content

17. Meta Tag Generator

18. Search Engine Spiders

http://www.searchwho.com/sw5-spider.html
See what robots and spiders see when they index the web page

19. Web site

Search Engine Watch
(http://searchenginewatch.com)

20. Blogs

Search Engine Watch Blog
(http://blog.searchenginewatch.com/blog/)

Aaron Wall's SEO Book.com
(http://www.seobook.com/)

Matt Cutts
(http://www.mattcutts.com/blog/)

Search Engine Lowdown
(http://www.searchenginelowdown.com/)

Search Engine Roundtable
(http://www.seroundtable.com/)

Threadwatch.org
(http://www.threadwatch.org/)

21. Forums

WebmasterWorld
(http://www.webmasterworld.com/)

Search Engine Watch Forums
(http://forums.searchenginewatch.com/)

SEO Chat Forums
(http://forums.seochat.com/)

High Rankings Search Engine Optimization Forum (http://www.highrankings.com/forum/)