Login Press

From auto login, social login, redirect after login, custom error message, limit login attempts, custom layout and many other awesome feature, Login Press got it all covered for customizing the WordPress login page. FREE (value $75/year)

Learning Management System (LMS)

If you ever need to build online learning module, Tutor LMS is one of the best and easy to use tool for managing all your courses, quizzes, etc. I have been using LearnDash for my clients and TutorLMS has some advantages in terms of functionality and customization. FREE (value $149/year)