Remember, you can use the comparison and report card spreadsheets for an at-a-glance look at the features, benefits, and drawbacks of each tool. In summary:
Causes on Facebook: Good for spreading the word, but better for gathering support than collecting donations.
Network for Good: Low-cost and easy to use, but more limited in the tools it offers.
AlumniFidelity: Has higher fees and takes longer to set up, but offers great customization.
FirstGiving: Offers lots of free resources and support, but the customizable fundraising pages have the highest cost of all the tools.