In some cases offering money _is_ the best way to offer support. When goods are donated they're often not what's actually needed, or not in the proportions required. Planet Money covered this in an episode: https://www.npr.org/2015/11/27/457565052/food-banks-pickle-g... (transcript rather than episode link). This relates to food banks, but it also affects other organizations: https://www.theguardian.com/world/2015/nov/03/aid-workers-at... .

If you can't offer that support then I suspect that spreading the word about these projects is the next best thing.

Edited to add additional links, tidy up language.