There is no such thing as too much training. Recently I have poking around the internet and stumbled across many options for familiarization and awareness level courses, no actual certifications, mind you. I couldn't find any other threads on the subject and I'm sure some of these are not new, but here is a list in case anyone is interested. I have not tried all yet but some sites I have encountered require verification of a specific field of work or study in order to register. To my knowledge, though, these do not. If anyone has any others that I haven't found yet please feel free to share!
Criminal Justice and Forensics
http://www.forensic-training-network.com/ (http://www.forensic-training-network.com/) --Forensics oriented familiarization courses.
http://www.nij.gov/training/all-courses.htm (http://www.nij.gov/training/all-courses.htm) --CSI and in depth forensics courses.
http://www.dna.gov (http://www.dna.gov) --DNA oriented training for first responders and others.
http://www.ruraltraining.org (http://www.ruraltraining.org) --Training on a variety of DHS and FEMA related topics.
http://www.teexwmdcampus.com/sign_in.k2 (http://www.teexwmdcampus.com/sign_in.k2) --Various DHS related topics.
Fire, HAZMAT, ICS, and Emergency Management
http://www.cfitrainer.net/ (http://www.cfitrainer.net/) --Fire Investigator oriented training.
http://www.saferesponse.com (http://www.saferesponse.com) --HAZMAT and ICS training for first responders.
http://training.fema.gov/IS/ (http://training.fema.gov/IS/) --FEMA independent study courses.
http://www.usfa.fema.gov/nfa/nfaonline/browse/index.shtm (http://www.usfa.fema.gov/nfa/nfaonline/browse/index.shtm) --National Fire Academy courses.
http://www.ncbrt.lsu.edu/elearn/ (http://www.ncbrt.lsu.edu/elearn/) --WMD oriented courses.
http://www.fireengineering.com/training/ffsupport.html (http://www.fireengineering.com/training/ffsupport.html) --Firefighting oriented courses.
AVIATION
http://www.faa-ground-school.com/ (http://www.faa-ground-school.com/) -- Free. Thats all I know.
http://education-portal.com/articles/List_of_Free_Online_Aviation_Courses_Lectures_and_Learning_Materials.html (http://education-portal.com/articles/List_of_Free_Online_Aviation_Courses_Lectures_and_Learning_Materials.html) --Self explanatory list.
MISC.
http://irtsectraining.nih.gov/publicUser.aspx (http://irtsectraining.nih.gov/publicUser.aspx) --National Institute of Health Info Security courses.
http://www.nachi.org/safety_course.htm (http://www.nachi.org/safety_course.htm) --Home Inspector courses.
http://cphp.sph.unc.edu/training/training_list/?mode=view_all (http://cphp.sph.unc.edu/training/training_list/?mode=view_all) --Public health courses.
http://www.ualbanycphp.org/learning/default.cfm (http://www.ualbanycphp.org/learning/default.cfm) --Public health courses.
Random and Fun
http://education-portal.com/article_directory/Free_Online_Courses_and_Education.html (http://education-portal.com/article_directory/Free_Online_Courses_and_Education.html) --Self explanatory list.
http://www.udacity.com (http://www.udacity.com) --College level courses.
http://www.edx.org (http://www.edx.org) --College level courses from notable universities.
http://www.khanacademy.org (http://www.khanacademy.org) --Video based education with exercises on a variety of subjects.
http://www.vocabulary.com (http://www.vocabulary.com) --Games built to enhance and stimulate growth in learning words.