Dial - Quick & beautiful macOS timer.
VLC Media Player - VLC is a free and open source cross-platform multimedia player and framework.
Smart Sloth - Smart Sloth uses the concept of timeboxing, which is to allocate a set amount of time to each task, therefore, creating a deadline which can increase the productivity of the user.
AIMP - AIMP : Free Audio Player : Официальный сайт программы
T-Clock Redux - T-Clock Redux in an enhanced fork of Stoic Joker's T-Clock 2010 with ISO week number support...
foobar2000 - An advanced freeware audio player for the Windows platform.