Performance Assessment Links in Science: http://pals.sri.com. Concentrates on k-12, but most tools can be adapted to college level.
List of online and/or downloadable critical thinking materials:
http:// www.WolcottLynch.com/.
Classroom Assessment Techniques: from the University of Southern Illinois University at Edwardsville
http://www.siue.edu/~deder/assess/catmain.html
A variety of assessment techniques from Eastern New Mexico University: http://www.enmu.edu/~smithl/Assess/welcome.html
List of links and other resources for assessment: http://www2.acs.ncsu.edu/UPA/assmt/resource.htm
American Association for Higher Education assessment forum:
http://www.aahe.org/assessment/
Center for Excellence in Learning and Teaching at Penn State:
http://www.psu.edu/celt/assessment.shtml
Dr. Helen Barrett's favorite links on Alternative Assessment and Portfolios:
http://transition.alaska.edu/www/Portfolios/bookmarks.html
University of Delaware Research-based Education: http://www.udel.edu/RAIRE
University of Michigan Undergraduate Research Opportunity Program: http://www.umich.edu/~urop/facres/evalurop.html