Referrer Spam Remover - Remove spam bots from your Google Analytics data
Inbox When Ready - Protect your focus... hide your Gmail inbox by default
Spam Check - A free JSON API to check your email messages' spam scores
Snailbox - Schedule your email at specific times and recover the time you're losing to your inbox.
CanIPhish - Blend social engineering with real-world phishing simulations to train your users how to detect the most advanced threats.All in a completely self-service, fast, free and modern SaaS platform.
Ugly Email for FireFox - Get back your email privacy, block email tracking