Discourse - Discourse is an open source discussion platform built for the next decade of the Internet.

Spike - Spike solves businesses' communication chaos by bringing together email, team chat, collaborative docs, and meetings, into one feed.

Flarum - Flarum is the next-generation forum software that makes online discussion fun. It's simple, fast, and free.

ProtonMail - Secure email with absolutely no compromises. Get your free encrypted email account today.

Simple Machines Forum - Simple Machines offers free open source software such as SMF, the powerful and easy to use community forum written in PHP. Start interesting discussions on your website!

Seald - Keep your conversations secure, everywhere.