Spectrum - Browser-based app to visualize the frequencies of an audio file.
InviteRobot - Instant subscription for paid Slack communities
The Rainmaker Platform - Build responsive websites and communities without code
SlackPass - Subscription access to anything with Slack
Amity Communities - Discuss trending topics, news, and live events in real-time
Grapevine Surveys - Grapevine is an online survey tool for employee surveys.