SlackPass - Subscription access to anything with Slack
Jodel - What is Jodel all about? Jodel is the community that shows you what's happening in your area in real-time.
Magik for Slack - Magik enables founders, marketers & community builders to create the community experience they never knew was possible.
Berkanan - Chat with people nearby. Even offline, on an ✈️.
Community Inviter - Auto invitations for Slack
Treadie - Create your own micro-social network for topics