F-Stop Media Gallery - Image and video organizer.
Google Authenticator - Google Authenticator is a multifactor app for mobile devices.
A Photo Manager - Manage local photos on Android: gallery, geotag with photomap, tags, find, sort, view, copy...
andOTP - andOTP is a two-factor authentication App for Android 4.4+
LeafPic - LeafPic is a fluid, material-designed alternative gallery.
Microsoft Authenticator - One app to quickly and securely verify your identity online, for all of your accounts.