PathwaysToScience.org has over 70 portable scholarships and fellowships posted on the site. These include undergraduate, graduate, and postdoc level funding opportunities with an emphasis on increasing diversity in STEM.
Undergraduate scholarships and tips and resources for applying: https://pathwaystoscience.org/Undergrads.aspx
Graduate fellowships and resources for applying: https://pathwaystoscience.org/Grad.aspx
Postdoc funding and resources: https://pathwaystoscience.org/Postdocs_Portal.aspx
A quick video tutorial on using our advanced search functions to find funding opportunities: https://www.youtube.com/watch?v=FxKsAGk8dAw&t=16s