Worldwide markets
TOP 5 marketplaces

WeTheNorh
A marketplace operating exclusively within Canada.

Vortex
Multi-currency marketplace with fast support (confirmed personally, the response is really fast)

Elysium
A marketplace with one of the lowest commissions for sales, a good place to start your business.

BlackOps
A promising marketplace with a large advertising reach, convenient functionality and stable operation.
Leading marketplaces

Abacus
A unique marketplace, operating for 3 years, positioning itself as a friendly and pacifist community dedicated to the study and trading of drugs

TorZon
TorZon Market launched Sep 2022, supports XMR and BTC payments, has established vendors, and a user-friendly platform.

DarkMatter
First market with XMR multisig, as well as the ability to create private shops

Archetyp
One of the most convenient marketplaces with quality usability and multi-lingual internal forum and many other features

Nexus
Multi-currency marketplace with a large listing of physical and digital goods
Challenger markets

CannaExpress
Currently the only popular canna-marketplace, operating worldwide

Kerberos
The only marketplace on the West Darknet that has its own mascot, Lucifer. Functioning for more than 3 years.

Atlas
A self-described marketplace, with payment options in BTC and XMR, 2FA, and waletless.

Catharsis
The only English-speaking marketplace with the ability to win staff in roulette. It is characterized by exceptional comfort.

Euphoria
BTC, multisig only and limited FE — all there is to say about Euphoria
New markets

Shadow X
The ideological successor to the Nemesis Marketplace, with a built-in feed-forum, similar to Twitter.

Mars
New intuitive and user-friendly drug focus market with really quick support.

Prime
The new marketplace on the drug dealing scene, with classic features common to all marketplaces, also has a feature with auctions.

THOR
New marketplace - accepts only Monero and operates worldwide, selling physical and digital goods, which are the most on the market right now.

Salem
There isn't anything special to highlight about this marketplace - but you will definitely be surprised by the captcha. :)
Forums

Dread
“Gateway to the Darknet” or a place to discuss anything related to hidden services and marketplaces.

Pitch
The alternative to Twitter in TOR is free discussions, the best place to start small hidden service projects because you can build up a first audience.

Breaking Bad
The best place to discuss the synthesis of psychoactive substances.