I know an internet search can show the options, but not all charities are created equal. I really just want to know what charities are known for using the donations sensibly, and if there are any that are in dire need of extra funds more than others.
Do not offer street homeless people shelter unless you have the skills, training and abilities necessary to support them long term, including dealing with the underlying issues which led to the person becoming street homeless in the first place and the subsequent issues which have kept them there.