PathwaysToScience.org has over 65 portable scholarships and fellowships posted on the site, all with an emphasis on STEM.
Undergraduate scholarships and resources for applying: Summer Research Programs & Scholarships in STEM (Undergrad level) (pathwaystoscience.org)
Graduate fellowships and resources for applying
Postdoctoral fellowships and postdoc positions
A quick video tutorial on using our advanced search functions to find funding opportunities link HERE