I found out about a super cool company a few days ago – CivChoice.
The basic gist is that you create an account with CivChoice, put money into it (which is a one-way street: it’s a “donation” to CivChoice), and from there you divvy it out to the charities of your choice.
You get a single receipt for tax purposes, rather than a dozen small ones from around the country.
And you can use it to quasi-anonymize donations in a workplace donation program – instead of Personnel or Accounting knowing (or choosing) where you donate via paycheck deductions, it all goes to CivChoice, and then you direct it from there.