A thread from Vox on Twitter with a list of organizations focused on helping the people in the Ukraine and the refugees who have left the country.
Listed by type of aid. First pages do not give contact information/links, but easy to look them up.
Aid Organizations for Ukraine - VOX
A second nested page does give links:
How to help
Please feel free to critique these lists, make additions, esp. access to local orgs. etc.
Ideally, places where a large % of the donation reaches the people.