Smart Slack Reminders - Schedule follow-up questions to any message in Slack 💬
Skype for Slack - Move your slack discussions to a group skype call
Task Reminder - Save time and energy with automatic reminders
Calls on Slack - Make voice calls in Slack
PullReminders - Review and release pull requests faster with Slack reminders and metrics.
Pingly - Your communication hub — Email, text & voice in one app