Quintessential Player (also called QMP and formerly QCD) was a freeware, multi-format media player developed by Paul Quinn.

Quintessential Player began life in 1997 as a CD-only player for Windows, when it was known as Quintessential CD Player (hence the 'QCD' moniker associated with the player). Over the years, Quintessential Player gained support for playing MP3s and other audio formats, video playback, and an optional media library was added to the player. This latter addition gave rise to the use of the name Quintessential Media Player, or QMP for short. PC World Magazine named Quintessential Player as one of their choices for 'Best Media Player', and it was also selected for inclusion in the Pricelessware list of best freeware.

It was the only way of submitting audio metadata (on CD tracks, artists, etc. as created by a tag editor) to Gracenote's CD database other than iTunes, and was still listed as such even in 2019.