Alternato - NOTE: Not available in English.
EventsBase - Find the best professional events nearby or globally
AlternativePedia - Discover free, open source or simply better alternatives for your software based on our research...
Rally by Eventbrite - Find the best local events and rally your friends to join
Aventrix - Aventrix is a website that helps you discover new and fun activities.
Komos - komos.io is a free tool, that helps you discover comedy events near you and get event tickets for your favourite comics.