One of my favorite organizations is Adopt a Native Elder. For $200/year you can "adopt" a Navajo elder and help supply them with critically needed goods and supples. You can also form a relationship with them. 

The elders are in dire poverty yet hold the wisdom of the tribe. They create beautiful traditional handmade rugs which they sell in a big show in March. If you can't afford the $200, you can donate in smaller amounts to help supply the materials needed to create the rugs. This contributes to the amelioration of poverty and supports an Indigenous tradition going far into the past.

Check it out!