Alums and members of the community regularly ask if it is possible to arrange for the same kind of off-campus access as is held by those currently affiliated with UT-Austin --- it isn't. Nor have we found an organization to join that offers the kind of library access you'd like to have. We can offer good access (in non-virus times) to subscription sources if you can come to campus.
Otherwise, here are suggestions of freely available options. Some are always a first choice and some are work-arounds. See the Free Resources page of the Access the Library After Graduation Guide for information about other subject areas.
Public Library Holdings
In Texas, public libraries are part of the TexShare community, providing access to a set of excellent databases, including full-text for many articles. These are "pre-paid" rather than freely available but be sure and check the holdings of your public library. Academic Search Complete and Business Source Complete are great databases for STEM content.
From the Libraries Databases List
Of note for STEM research:
Plus databases that the UT-Austin Libraries have in a different form. These should not ask for credentials, though full-text will only be supplied if it is open-access.
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