Repositórios Abertos Generalistas

SARC - Serviço de Alojamento de Revistas Científicas (Portugal)
RCAAP - Repositórios Científicos de Acesso Aberto de Portugal
RCIPS - Repositório Científico do IPS

ArXiv - Scholarly articles in the fields of physics, mathematics, computer science, quantitative biology, quantitative finance, statistics, electrical engineering and systems science, and economics
DBLP - The dblp computer science bibliography provides open bibliographic information on major computer science journals and proceedings
DRIVER - Digital Repository Infrastructure Vision for European Research
e-LiS - E-prints in Library & Information Sciences
INDEXAR – Repositórios Digitais do Conhecimento - Ponto de acesso a repositórios e revistas científicas digitais na área da ciência e da cultura
OpenAIRE - Open Access infrastructure for Research in Europe
OpenDOAR - Directory of Open Access Repositories
Open Research Europe
PHIL - Public Health Image Library - Offers an organized, universal electronic gateway to Centers for Disease Control and Prevention pictures
RECOLECTA - Recolector de Ciencia Abierta
ROAD - Directory of Open Access Scholarly Resources
Scielo - Scientific Electronic Library Online
ScienceOPEN - Search and discovery platform
Unpaywall - An open database of 28 746 108 free scholarly articles
Zenodo - Zenodo makes the sharing, curation and publication of data and software a reality for all researchers