VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
AIMP - AIMP : Free Audio Player : Официальный сайт программы
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
foobar2000 - An advanced freeware audio player for the Windows platform.
LightShot - The fastest way to take a customizable screenshot.