Googlefight Compares frequency counts of keyword searches.
Google Alert Emails alerts about new or changed webpages according to your keywords searches. Draws on a variety of News media sources, but contains a strong anglo-saxon bias.
Google News Alerts Emails news alerts according to your keywords. Draws on a variety of News media sources, but contains a strong anglo-saxon bias.
Googleshare Estimated collocations of keywords in webpages. Now defunct.
KartOO (Flash only) KartOO clusters webpages according to keyword searches.