What are some alternatives?
MailChimp - MailChimp is the best way to design, send, and share email newsletters.
Discourse - Discourse is an open source discussion platform built for the next decade of the Internet.
MailerLite - Affordable Email Marketing Software. Get all features (Segmentation, Automation, A/B testing) for up to 1,000 subscribers & send unlimited emails for free!
phpBB - Raspberry Pi. The Raspberry Pi is a cheap, credit-card sized computer. The official website uses phpBB for their discussion forums. phpBB is not affiliated with nor responsible for any of the sites listed on the showcase.
GetResponse - Email marketing from GetResponse. Send email newsletters, campaigns, online surveys and follow-up autoresponders. Simple, easy interface. FREE sign up.
Flarum - Flarum is the next-generation forum software that makes online discussion fun. It's simple, fast, and free.