Horde - Horde Groupware is a free, enterprise ready, browser based collaboration suite.
Houseparty - Brining empathy to online communication.
Roundcube - Web-based IMAP email client
Squad - Screen share with friends from a group video chat ✨
Mailo - Mailo is an email client where you can send and receive emails to and from anyone with an email address.
Tribe - Create highly targeted Twitter ad campaigns in 5 mins