coreg

Some stuff I use regular

Hotspot Shield - better than a proxy

Get Behind the Shield! Hotspot Shield by AnchorFree

Google AdPlanner

http://www.google.com/adplanner/

Insights For Search

Google Insights for Search

Laser URL

Laser URL Tutorial Videos are Ready

Quantcast

Quantcast - Home

SEM Rush

SEMRush - service for competitors research, shows Google organic and AdWords keywords for any site or domain

Microsoft Ad Lab

Advertising and Data Mining Tools: Microsoft adCenter Labs

I'll find some more