Short Informal Reports
http://jerz.setonhill.edu/writing/technical/reports/index.html
This document introduces two basic principles of technical communication-meeting the reader's needs and using the inverted pyramid.

Progress Reports
http://www.io.com/~hcexres/tcm1603/acchtml/progrep.html
This document deals with the purpose, timing, format, and organization of progress reports.

Engineering Lab Reports
http://www.engr.udayton.edu/Special/Writing/labrep/
default.htm
The University of Dayton maintains this detailed site about writing engineering lab reports.