Meetup - Helps groups of people with shared interests plan events and facilitates off line group meetings in various localities around the world.

PullReminders - Review and release pull requests faster with Slack reminders and metrics.

Eventbrite - Discover Great Events or Create Your Own & Sell Tickets

emacs-slack - slack client for emacs. Contribute to yuya373/emacs-slack development by creating an account on GitHub.

Calendify - Calendify is an event community where you can share, publish, and subscribe to event calendars. It helps you to stay informed about what you are interested in and what is yet to come.

Translate - Google's free service instantly translates words, phrases, and web pages between English and over 100 other languages.