arXiv (preprints, a large number of papers are uploaded here before/after communicating to the journals ) : https://arxiv.org/
Virtual Science Forum (recorded talks on various topics useful to researchers): https://virtualscienceforum.org/
Link to the recordings of the online workshop on superconducting diode effects: https://virtualscienceforum.org/josephson-diode/
Link to online school on Floquet dynamics: https://virtualscienceforum.org/floquet-school/
Physics Today - important developments in physics discussed at an elementary level https://physicstoday.scitation.org/journal/pto
A nice blog by Prof. Douglas Natelson where various concepts/developments in condensed matter physics are discussed:
https://nanoscale.blogspot.com/2026/01/updated-cmnano-primer-2026-edition.html