This database provides access to thousands of works by women and gender-marginalized composers.Over 8,000 works by more than 1,200 composers, available for free.
News article from the Guardian from March 5, 2022 about a recent discovery of madrigals by Maddalena Casulana, the first woman composer to publish her own music.
From their website: "an open-source searchable index created for the purpose of increasing the visibility, access, and serendipitous discovery of chamber works written after 1945 by women composers."