Power Toggles - An advanced power control widget for both your homescreen and notification panel. Free without ads.
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Do Not Disturb Toggle - Do Not Disturb Toggle allows you to switch on and off your phone to automatically mute incoming calls and notifications.
AIMP - AIMP : Free Audio Player : Официальный сайт программы
Quick Settings - Your dedicated Android expert remotely or on-site. Technical advisory, creating and reviewing software architecture, Android development, code reviews and trainings.
foobar2000 - An advanced freeware audio player for the Windows platform.