(The above are just a few old/larger ones and limited to Europe/US, comment below to add others)

Some media outlets:

freedomnews.org.uk (Britain)
solidaridadobrera.org (Spain)
paris-luttes.info (France)
graswurzel.net (Germany)
voidnetwork.gr (Greece)
umanitanova.org (Italy)
tidningenbrand.se (Sweden)
itsgoingdown.org (US)
channelzeronetwork.com (podcasting)
planet.squat.net (global squatting)

If looking for reading materials on anarchism:

libcom.org is a truly huge archive, and its libcom.org/collections/reading-guides are excellent.

theanarchistlibrary.org has endless books and texts, with a good search function

Picture of Pierre Joseph Proudhon, author of What is Property

Anarchism/Anarchy note: There's effectively two definitions. The best known is chaos. The other is a political philosophy emphasising liberty and questioning assumed authority, which began in earnest in 1848 with Proudhon's famous line "Property is Theft." en.wikipedia.org/wiki/Pierre-...

Bit of a holding account, the follows are of anarchist groups worth keeping an eye on and may be updated periodically.