Per the comments, I contacted the people at FEEA, Federal Employee Education & Assistance Fund, to see if that might be a good place to donate for those looking to help furloughed federal workers. Here is what they said:
We are in desperate need of donations for a program we just launched targeting the lowest income feds with micro grants for groceries, gas, diapers, etc. Donations can be made here.
Here is the description of the program.
I just sent gave them 50 bucks. This shut-down may go on for a long time and federal workers need our support.