MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Woolah - Knockout Photo challenges with your friends.
Brevo - Innovative online Email Marketing solution to manage your contacts, create & send your newsletters and track your results. More than 80 000 clients. Best prices and attractive features.
SPAR! - Challenge your friends. Put money on the line. Get better.
Campaign Monitor - Email marketing software built for designers and their clients to run successful email campaigns.
QuizUp - QuizUp gives you the opportunity to test your trivia skills against friends and strangers throughout the world.