https://magentocommeng.slack.com
Generic Channels:
#general - community wide discussions
#announcements - all kind of announcements (new Magento 2 releases e.t.c.)
#random - non-magento related conversation/jokes/watercooling e.t.c.
#event -EVENTNAME - groups for given events such as contribution days, conferences e.t.c.
#events - generic channel for all event-based topics
#github - conversations around GitHub issues and Pull Requests
Special Project Channels:
#msi - https://github.com/magento-engcom/msi/wiki
#import-export - https://github.com/magento-engcom/import-export-improvements/wiki
#graphql - GraphQL
#pwa - Progressive Web Apps
#bulk-api - Bulk API https://github.com/magento-engcom/bulk-api/wiki
#japanese-localization - Japanese specific localizations
#pwa - Progressive Web App
Other Channels:
#marketplace - Magento Marketplace, Extentions Quality Program e.t.c.
#cloud - Magento Commerce Cloud
#mom - Magento Order Managment
#deployment - Deployment Tools, Flows e.t.c.
#mftf - Magento Functional Testing Framework
#b2b - B2B
#infrastructure - Docker, Vagrant, AWS, hosting, etc.