This webpage does not provide a "full" list of what is available, but as many as possible. This page lists freely accessible, no-cost information, medium, data, database, and guidelines to assist in one's scientific research studies. People without substantial financial resources also requires high quality materials, and thanks to these and similar works, it is possible. This list will be a dynamic, living toolkit for scientists. In case the viewers have a recommendation that can fit in one of the categories below, providing resources freely with no cost, they can inform FIRE-AE about them.

Textbooks

Free, Openly Available at no Cost and High-Quality

LibreTexts: As of August 31, 2024, 2815 books, mostly in English ranging from agriculture, to differential aquations to workforce fundamentals.
The Scientist and Engineer's Guide to Digital Signal Processing
Time Series Analysis with R by Saif Shabou
Machine Learning for Intelligent Systems (Course Materials with videos)

Training Courses

Free, NO-COST CERTIFICATES

General - Soft Skilss

Domain Specific Skills

Journals and Preprint Servers

Peer-reviewed, Free-to-submit, Free-to-read

Peer-reviewed Journals

Chemistry

CHIMIA

Physics

Environmental Science

Environmental Health Perspectives

Geoscience

Data Science - Applied Statistics

Data Science and Engineering

Preprint Servers

arXiv: (Since 1991) Physics, Mathematics, Computer science, Quantitative biology, Quantitative finance, Statistics, Electrical engineering and Systems science, and Economics
chemRxiv: (Since 2017) Chemistry
bioRxiv: (Since 2013) Biology
medRxiv: (Since 2019) Medicine

Data

Publicly available, no-cost

Here is a list of data with free access, no-cost, and even permitting commercial use-cases without incurring additional cost. Only sort-of-complicated part is that some hubs require free registration, several token generation and API access via those tokens, but it will take an hour at most to get over this.