Pattern-based spam detection for Gmail
https://emailtracker.website/
https://www.sort-gmail-inbox.com/
https://mailboss.org
https://mailerplex.com/
https://gmail-inbox-zero.com/
https://www.html-editor-for-gmail.com/
https://mailseen.com
https://trimbox.io
https://www.gmailtabs.com/
http://rebump.cc/
https://emailstylerpro.com
https://www.email-templates.com/
