Organizations
American Society for Indexers www.asindexing.org
Editorial Freelancers Association www.the-efa.org
Rocky Mountain Publishing Professionals www.rmppg.org

Books and Journals
I-Torque online journal www.i-torque.us

Indexing Software
CINDEX www.indexres.com
MACREX www.macrex.com
SKY Index www.sky-software.com
wINDEX www.abbington.com/holbert/windex.html

Miscellaneous
Chapter List of Favorite References PDF format
Chemistry Symbols (Doreen McLaughlin) PDF format