SOGo - SOGo is groupware server with a focus on scalability and open standards.
#DefeatByTweet - When Trump tweets, we donate to stop his re-election.
Baïkal - Cal and CardDAV server
MUTE - Crowdsourced words list to mute on social media
Radicale - The Radicale Project is a complete CalDAV (calendar) and CardDAV (contact) server solution.
Trump Filter - Chrome extension that removes Donald Trump from the internet