Workona - A better way to work in the browser.
Parallel Space - Parallel Space – Multiple accounts and Two-Face is free to use mobile app that helps you clone or run multiple accounts of the same app simultaneously, and use themes to style your unique space.
Session Buddy - Manage Your Browser Sessions
Dual Space - It is a first application that is compatible with WhatsApp completely.
Toby - Better Than Bookmarks
App Cloner - Clone your Android apps so you can use multiple logins.