There are hundreds of communication tools and Slack has a great interface which allows users to engage in meaningful conversations. this makes it a very attractive tool to online groups and communities. although slack doesn’t promote itself as a community management tool but rather for teams in a business. there are already 100’s if not 1000’s of thriving online groups.
Slackgroups.com allows you to look for online communities of your interests and also post your online community which will allow you either join an online group of your interest and or post your existing group which will allow you to get member
I build this using bootstrap less, jquery UI and HTML and it took me around 2 days over the weekend to build this and populate this site
now the next challenge is to evolve this site further