XMplay audio player (
http://www.un4seen.com/ ); no more waiting for a huge download, runs on older operating systems, no more waiting for long startup times and aobe all free.
Download size? Uhhh... 290kB.?

How much memory does it use? Uhhh... 1MB.? 8} Does it need to be installed? Heck no!? [bustagut]? So you can even put it on your USB key.
Supports the OGG / MP3 / MP2 / MP1 / WMA / WAV / CDA / MO3 / IT / XM / S3M / MTM / MOD / UMX audio formats, and PLS / M3U / ASX / WAX playlists. A load more formats are also supported via plugins.
Features:
Balls-on accurate
32/24-bit & multi-channel output
Gapless output
Interpolation & volume/pan ramping
DSP
Net streaming
Track information
Title formatting
Library
Saved/preset settings
Disk writing
Keyboard shortcuts
Integration
Archive plugins
Unicode file support
Visualisation
No installation
Skins
Just in case you want things small and straightforward.?