Winamp 5.53 Full Build 1924
I believe that almost everybody using a PC knows anything about Winamp. Well, just for the record, Winamp has a lot of cool features which make it an extremely valuable and versatile media player. 
Among it’s countless features I liked the following: you can synchronize your Media Library with your portable media player: compatible with iPod, Creative, and Microsoft Plays For Sure devices. It contains coding Technologies aacPlus High Bitrate encoder available in Winamp Pro, Coding Technologies aacPlus (HE-AAC) in MP4 container Coding Technologies LC-AAC encoder.
A feature which I personally liked is the Predixis Smart Playlist Generator to list your songs according to the way they sound. The program has lots of customizable components: Winamp Agent, Library, modern Skin Support, User Interface extensions, Audio file support, video file support, visualizations, extra audio output/effect support. You can associate it with audio, video, audio CDs, playlist files.
Automatic download and install codecs and libraries also available.
Other cool features include: Dynamic AJAX Internet Media Hub, gapless MP3 playback, multi-user profile options, remembers your previous installer settings, right-to-left playlist display.
Since it’s an extremely friendly media player, Winamp give you the freedom of choosing one of of the thousands of skins available for download; it also incorporates a powerful graphic equalizer which includes lots and lots of predefined presets or gives you the possibility to save your own.