Here are a few Search Engine (SE) tools:
Keyword
Density Analyzers:
Analizer #1
Analyzer
#2
Keyword
Extractor
Extractor
#1 or #2(same)
Link
Popularity:
Link #1
Link #2
Link
#3
Themes:
Theme#1
SE
optimization tips:
Tips
#1
Tips #2
Your
site positioning with major SE:
Check #1
SE
ratings: who's the best?
Ratings
#1