The Net Advance of Physics (Review Articles and Tutorials in Encyclopaedic Format) - https://web.mit.edu/~redingtn/www/netadv/
ParticleBites (HEP reader's digest) - https://www.particlebites.com/?paged=1
AstroBites (Astro reader's digest) - https://astrobites.org
Mathematics for Physics | An Illustrated Handbook - https://www.mathphysicsbook.com
Science | Writes (A toolkit for writing in sciences) - https://www.sciencewrites.org
The snarXiv - https://snarxiv.org and an article on it.
World Science U - https://worldscienceu.com
arXiv vs. snarXiv - https://snarxiv.org/vs-arxiv/ and an interesting article on it.
4gravitons - https://4gravitons.com
Stanford Encyclopedia of Philosophy - https://plato.stanford.edu/contents.html
An example gallery for graphics using LaTeX - https://texample.net/tikz/examples/
Prof. Hermann Weylmann - http://www.weylmann.com
The alphaXiv - https://www.alphaxiv.org
Sioyek - An useful PDF reader for academics - https://sioyek.info
Prof. Daniel Baumann's notes on General Relativity, Cosmology, Advanced Cosmology, and Quantum Field Theory.
Lectures on Quantum Theory by Dr. Frederic Schuller - https://youtube.com/playlist?list=PLPH7f_7ZlzxQVx5jRjbfRGEzWY_upS5K6&feature=shared
Lectures on Geometrical Anatomy of Theoretical Physics by Dr. Frederic Schuller - https://youtube.com/playlist?list=PLPH7f_7ZlzxTi6kS4vCmv4ZKm9u8g5yic&feature=shared
Dr. Satoshi Nawata's lectures on QFT, String Theory, Differential Geometry, and Topology in Physics - https://www.youtube.com/@SatoshiNawata/
Dr. Mritunjay Verma's notes on a variety of topics - https://sites.google.com/view/mritunjay314/notes
Richie Dadhley's notes on a variety of topics - https://richie291.wixsite.com/theoreticalphysics/all-notes
Introductory videos on General Relativity as a Quantum Field Theory - https://youtube.com/playlist?list=PL25HTsmhMPHRIJXCLvVNv9h4ArB5qQxzF&feature=shared
Technical cosmology talks aimed at cosmology students, current researchers, and former researchers - https://www.youtube.com/@CosmologyTalks
An introductory playlist on differential forms by Michael Penn - https://youtube.com/playlist?list=PL22w63XsKjqzQZtDZO_9s2HEMRJnaOTX7&feature=shared
Prof. Münchmeyer's notes on Computational Cosmology and Machine Learning in Physics - https://munchmeyer.physics.wisc.edu/lecture-notes/
Prof. Ashoke Sen's Lecture Notes - https://home.icts.res.in/~sen/
Gravitational Effects of a Small Primordial Black Hole Passing Through a Human Body - https://arxiv.org/abs/2502.09734
Science of a coffee cup: a physicist walks into a bar... - https://arxiv.org/abs/2501.01180