Discourse - Discourse is an open source discussion platform built for the next decade of the Internet.
GitHub Team Discussions - Now there's more space to talk through your projects 💬
Spectrum - Browser-based app to visualize the frequencies of an audio file.
Capiche - Glassdoor for SaaS pricing
Skype for Slack - Move your slack discussions to a group skype call
Discussing Design - Improving communication and collaboration through critique