Methods & Tools is a free e-newsletter for software developers, testers and project managers. Winter 2008 issue's content:

* Fingers in the Air: a Gentle Introduction to Software Estimation
* Behavior Driven Database Design
* Optimizing the Contribution of Testing to Project Success
* Service Components and Compositions

45 pages of software development knowledge that you can download from
http://www.methodsandtools.com/mt/download.php?winter08