Women in HVACR
http://www.womeninhvacr.org
National organization with women in the HVACR industry with an annual conference, webinars, membership newsletter and member directory.

Work4Women
http://www.work4women.org
On-line support groups for technical/mechanical, information technology, telecommunications, construction, and more. Virtual communities.

WomenTech Talk
http://www.womentechworld.org/womentechtalk.htm
WomenTech Talk lets you meet other women like you through conversations that take place in your email. WomenTech Talk has nearly 500 women participating and has been in existence since 2000. Join in the monthly discussion panels with experts on topics such as "Developing Male Allies in Your Male-Dominated Field" and "Finding a Mentor."