XPrivacyLua - Really simple to use privacy manager for Android 6.0 Marshmallow and later (successor of XPrivacy).
App Cloner - Clone your Android apps so you can use multiple logins.
App Ops - modifies the settings of "appops" in Android system
island - a free and opensource alternative to parellel space
PilferShush Jammer - Block unwanted use of onboard microphone
Dual Space - It is a first application that is compatible with WhatsApp completely.