Cardboard Boomerang [more]
Explains how to design and make a cardboard boomerang, with pictures and videos.
http://www.science.edu.sg/ssc/detailed.jsp?artid=3794&type=4&root=205&parent=205&cat=237

Finger Boomerangs [more]
Plans for making and flying small boomerangs made from file card paper.
http://www.grc.nasa.gov/WWW/K-12/TRC/Aeronautics/FINGER_BOOMERANGS.html

Four Wing Boomerang [more]
Plans for building and flying a four-wing boomerang from a manilla file folder.
http://www.reachoutmichigan.org/funexperiments/agesubject/lessons/other/Four_Wing_Boomerang.html

How to Make Boomerangs That Come Back [more]
Basic description for construction of various boomerangs.
http://www.btinternet.com/~fulton/boomerng.htm

MrDunston Boomerangs [more]
Crafting and throwing instructions, plans, photos and links.
http://www.mrdunston.com/boomerang

Whishhbone Boomerangs [more]
Instructions for making your own. Includes materials, shapes, pattern, airfoils, carving, and tuning discussions.
http://whishhbone.freeyellow.com/construction.html