Poweramp is one of the biggest and best music player apps available, and it has actually been around for some time. In fact, the app has an average rating of 4.5 stars and that is with over 146,500 ratings! That's an impressive feat by any measure, especially on Android. The developer is celebrating that they had a very good year, so they are offering Poweramp for only $1.99 for 48 hours starting at Noon CST. The regular price is $4.99, so this is a juicy sale to be sure. Just as a recap, here is the rich featureset of this incredible music player:

Key Features:
- plays mp3, mp4/m4a (including alac), ogg, wma*, flac, wav, ape, wv, tta, mpc, aiff (* some wma pro files may require NEON support)
- 10 band optimized graphical equalizer for all supported formats, presets, custom presets
- separate Bass and Treble adjustment
- stereo eXpansion, mono mixing, balance
- crossfade
- gapless
- replay gain
- plays songs from folders and from own library
- dynamic queue
- lyrics support, including lyrics search via musiXmatch plugin
- embed and standalone .cue files support
- support for m3u, m3u8, pls, wpl playlists
- OpenGL based cover art animation
- downloads missing album art
- 4 configurable widget types
- configurable lock screen with optional Direct Unlock
- headset support, automatic Resume on headset and/or BT connection (can be disabled in settings)
- scrobbling
- tag editor
- visual themes, including support for external/3rd party skins
- fast library scan
- high level of customization via settings
Source: Twitter - Poweramp and AndroidMarket