Chanced upon hamsterpad today while digging around. Good place to start and explore the crazy open world of Slack. Kinda felt like the first time I opened Tor and explored the dark net. All the amazing places to look at (without the nefarious intents)
Hamsterpad is a good aggregator and directory of open Slack groups to join (based on your interest). There are certain groups that are private and will require an invite to be granted access
The fastest way to navigate through this is probably just a basic browser search of keywords (I hope hamsterpad will build in something soon based on keywords, tags and definitely a recommendation engine to suggest similar Slacks)
