In my research, I came across a gem of a site called Charity Navigator. Charity Navigator basically evaluates charities and posts information about them. The site not only gives information as to what companies do with your donations, but also provides information to companies on how to improve their performance as a charity.
More than that, it has information for consumer, philanthropists, advocates, whatever you wish to be called, on how to go about determining charities to donate or volunteer with, and even how to deal with charity solicitors.
There is so much useful information provided on this site and it is free and easy to use. I would recommend that, anyone looking to spread love with their big hearts, Charity Navigator be the first place you turn for all your sharing needs.