List of the worst offenders: http://www.tampabay.com/americas-worst-charities/
Other resources where you can look up charities to see what percentage of funds they actually donate to their causes:
- Tech journalist since the dark ages. Windows Secrets, LangaList newsletter, Windows Magazine (NetGuide, Home PC), Byte, Popular Computing, yadda yadda yadda. Google me, if it matters.
This feed is mostly personal interest; it's NOT my professional writing. There's tech here, yes, but also lots of general science and some politics and weird humor thrown in.