For website visits, traffic sources, countries, keywords, and other sites VISITED, you can use Google Trends for Websites.

For organic search keyword analysis (share of shelf, unaided brand recall, competitive indexing, industry analysis) use Insights for Search.

For PAID search keyword reporting (volumes, competitive performance, CPS's etc.) use the AdWords Keyword Tool.

For demographic and psychographic analysis (age, gender, income, education etc.) use the DoubleClick AdPlanner.

There are many, many paid tools in the market (LIKE HitWise and Compete and Netsuus). Above are just the FREE ones whose datasets are is large enough to provide good data. They are all Google tools

For website visits, traffic sources, countries, keywords, and other sites visited, you can use Google Trends for Websites.

For organic search keyword analysis (share of shelf, unaided brand recall, competitive indexing, industry analysis) use Insights for Search.

For paid search keyword reporting (volumes, competitive performance, CPS's etc.) use the AdWords Keyword Tool.

For demographic and psychographic analysis (age, gender, income, education etc.) use the DoubleClick AdPlanner.

There are many, many paid tools in the market (like HitWise and Compete and Netsuus). Above are just the free ones whose datasets are is large enough to provide good data. They are all Google tools