IDEAS/RePEc is a decentralized, open-access platform (launched 1997) aggregating over 5 million economics research items (articles, working papers) from 2,300+ global archives. Offers free access to journals, rankings, author profiles, and tools like citation analysis. Volunteer-driven, it enhances visibility and collaboration in economics, supporting scholars worldwide, especially from underrepresented regions.

Directory of Open Access Books (DOAB) is a community-driven discovery service (launched 2012) indexing 21,000+ peer-reviewed OA books from 800+ global publishers, ensuring quality via strict criteria (e.g., peer review, open licensing). Managed by the non-profit DOAB Foundation, it enhances visibility and access to OA books across disciplines. Partners with platforms like OAPEN, JSTOR, and SciELO, and initiatives like PRISM for transparency. Free for users, it supports equitable scholarly communication globally

IMF eLibrary is the International Monetary Fund’s open-access digital platform providing free access to 21,000+ publications (journals, books, working papers) and statistical tools since 1946. Covers macroeconomics, globalization, development, and policy analysis. Features multilingual content, citation exports, alerts, and integration with IMF Data. Updated daily, it supports global research and policymaking with peer-reviewed insights

OAPEN is a nonprofit open-access platform (founded 2011) hosting 25,000+ peer-reviewed academic books globally. It supports publishers, libraries, and funders with hosting, dissemination, and digital preservation services. Partnering with institutions like UKRI and DFG, it promotes equitable access to scholarly works via FAIR principles and partnerships

PLOS (Public Library of Science) is a nonprofit open-access publisher founded in 2000, pioneering open science with journals like PLOS ONE, which evaluates research based on methodological rigor rather than perceived impact. It hosts multidisciplinary research under CC BY licenses, charging APCs (e.g., $1,745/article) but offering fee waivers. Recent initiatives include transitioning to APC-free models via grants and partnerships to promote equity and global access

MIT OpenCourseWare (OCW) is a free, open-access platform launched in 2001 by MIT, offering materials from 2,500+ courses across all disciplines. Hosting syllabi, lecture notes, videos, and textbooks under a CC BY-NC-SA 4.0 license, it supports lifelong learning without registration or fees. With 300+ million visits and partnerships like Open Education Global, OCW democratizes education, empowering educators and learners worldwide

National Digital Library of India (NDLI), launched in 2018 by India’s Ministry of Education, is a free, multilingual platform aggregating 100+ million resources (books, articles, videos, simulations) across disciplines and academic levels. Managed by IIT Kharagpur, it supports 12 Indian languages and offers exam prep tools, research aids, and accessibility features for differently-abled users. Its NDLI Club fosters community engagement through 5,800+ institutional learning hubs, aligning with SDG 4 for equitable education.

Connecting-Africa.net is a research gateway (launched 2004) aggregating 95,000+ African scholarly publications from 100+ global repositories, managed by the African Studies Centre Leiden. It enables advanced searches across publications, experts, and organizations, promoting open access to African research. Features include metadata harvesting via OAI-PMH and partnerships supporting ethical self-archiving, enhancing global visibility of African scholarship

African Journals Online (AJOL) is a South Africa-based nonprofit platform established in 1998 to amplify the visibility and accessibility of African-published scholarly research globally. It addresses the underrepresentation of African scholarship by aggregating peer-reviewed journals from the continent. Key Features: Content: Hosts 883+ journals from 37 African countries, with a focus on health, agriculture, social sciences, and African studies28. Open Access: Over 50% of its 257,000+ full-text articles are freely accessible, with 40,000+ available without fees28. Quality Standards: Journals undergo evaluation via the Journal Publishing Practices and Standards (JPPS) system to ensure ethical and academic rigor218. Technology: Built on open-source platforms like Open Journal Systems (OJS) for efficient content management820. Access & Usage: Requires free registration for full-text downloads, though abstracts are openly accessible28. Receives 200,000+ monthly visits, with half originating from African users

Directory of Open Access Journals (DOAJ) is a global, community-curated directory launched in 2003 to promote equitable access to 21,480+ peer-reviewed open access journals and 11 million+ articles across disciplines and languages. It enforces strict quality standards (e.g., peer review, open licensing, no fees/embargoes) and awards a DOAJ Seal for best practices. Free for users and publishers, it combats predatory publishing via initiatives like Think. Check. Submit. and partnerships with COPE, OpenAIRE, and OASPA

BioOne is a nonprofit digital publisher (founded 1999) offering BioOne Complete, a curated aggregation of 200+ journals and 360+ eBooks in biological, ecological, and environmental sciences. It partners with 150+ societies and libraries, prioritizing equitable access via initiatives like a 2026 Subscribe to Open pilot for 71 titles. Over $78 million has been returned to publishers, supporting sustainable scholarly communication