First, you will need to join the Discord server.
Discord groups channels by category, and each project has a distinct one. Once you're in the server, here are links to specific projects:
Graduated projects:
- Hyperledger Aries
- Hyperledger Besu
- Hyperledger Fabric
- Hyperledger Indy
- Hyperledger Iroha
- Hyperledger Sawtooth
Projects in incubation: