LoginPress - Customize and secure your boring WordPress login pages
analyze.email - Test the spam-y-ness of your emails
Triviaplaza - Triviaplaza is a place where you can find tons of quizzes to play and win points for giving correct answers.
Canned Emails - A minimal site with prewritten emails
Patchstack - Monitor all your WordPress sites for security vulnerabilities found by our community of ethical hackers.
DeepMail - Diligently sourced emails. Accurate emails for Startups and established companies