Microsoft Search Funnel Tool: http://adlab.microsoft.com/Search-Funnels
Google AdPlanner: http://www.google.com/adplanner/
Google Alerts: http://www.google.com/alerts
Google Keyword Tool: https://adwords.google.com/select/KeywordToolExternal
Google Reader: http://www.google.com/reader
Google Trends: http://www.google.com/trends
Quintura: http://www.quintura.com/