LogParser

LogParser is a great command-line tool that allows to execute sql-like queries on any type of text files. This is indispensable for parsing .log files, etc.

This tool can be found at:

http://www.microsoft.com/downloads/details.aspx?FamilyID=890cd06b-abf8-4c25-91b2-f8d975cf8c07&displaylang=en

And its use explained in:

http://www.codinghorror.com/blog/archives/000369.html

, and

http://www.securityfocus.com/infocus/1712