NetGuard - NetGuard
KeepSafe - Keep your entire photo library safely stored in an encrypted private cloud.
AFWall+ - AFWall+ (Android Firewall +) - iptables based firewall for Android
AppLock (FOSS) - A privacy App lock FOSS application.
Mobiwol - Mobiwol is a NoRoot Firewall
Hexlock - Security app locker keeps apps private with smart profiles for any situation