July 2026
- arXiv.org — Open-access archive for scholarly articles in physics, mathematics, computer science, and more. Recently redesigned with improved search and filtering.
- Hugging Face — The AI community hub for sharing models, datasets, and applications. Hosts over 500,000 open-source models.
- Connected Papers — A visual tool to help researchers find and explore papers relevant to their field of work, using a graph-based approach.
- Papers with Code — Free resource linking machine learning papers with their implementation code and evaluation tables.
- BASE (Bielefeld Academic Search Engine) — One of the largest search engines for academic open-access resources, harvesting metadata via OAI-PMH from over 10,000 content providers.