Free Engineering Learning Resources
Free Engineering Books
Directory of Open Access Books (DOAB)- Peer-reviewed academic books.
Open Textbook Library-Free engineering and STEM textbooks.
OAPEN Library- Open-access engineering and scientific books.
Project Gutenberg-Free classic engineering and science books.
National Academies Press- Engineering books available as free PDFs.
Free Journals & Research Articles
Directory of Open Access Journals (DOAJ)
IEEE Open Access
SpringerOpen Journals
Elsevier Open Access Journals
Wiley Open Access
Cambridge Open Access
Research Paper Repositories
arXiv- Computer Science, AI, Electrical Engineering, Mathematics, Physics.
EngrXiv- Engineering preprints.
CORE- Millions of open-access research papers.
OpenDOAR- Directory of institutional repositories.
OpenAlex- Open scholarly index.
Indian Engineering Resources
National Digital Library of India (NDLI)
NPTEL- IIT online courses and lecture notes.
SWAYAM- Free online courses from Indian universities.
Shodhganga- Indian theses and dissertations.
Virtual Labs- Online engineering laboratory simulations.
Thesis & Dissertation Repositories
NDLTD (Networked Digital Library of Theses and Dissertations)
MIT DSpace
IIT Gandhinagar Repository
Scholarly Search Engines
Google Scholar
Semantic Scholar
BASE Search