Nullsoft Winamp is a fast, flexible and high-fidelity media player for Windows. Winamp supports playback of many audio (MP3, OGG, AAC, WAV, MOD, XM, S3M, IT, MIDI, etc) and video types (AVI, ASF, MPEG, NSV), custom appearances called skins (supporting both classic Winamp 1.x/2.x skins and Winamp 3 freeform skins), audio visualization and audio effect plug-ins (including two industry dominating visualization plug-ins), an advanced media library, Internet radio and TV support, CD ripping, and CD burning. Winamp 5.5 comes bundled with the latest version of the ground breaking AVS (Advanced Visualization Studio) and Milkdrop visualizers. Enjoy over 100 bundled visualization presets created by users. Switch between presets manually or sit back and watch your presets on Random.

Features:
» Now Playing: Discover Artist Songs, Videos, Radio and Photos
» AOL Radio Powered by CBS Radio
» Expanded Flash video support
» Media Monitor: Playing music on the web just got even better
» Language packs available in Chinese, Japanese and Korean
» Updated Winamp toolbar - control Winamp from your browser
» A Redesigned Unified Interface, including Album Art
» Remote Music and Video Playback and Sharing
» Dynamic Song Recommendations Playlist Feature
» Multi-channel MP3 Surround Support
» Mass Auto-Tagger Provides Latest Music Metadata
» Integrated Web Search for Artist and Track Information
» Album Art Support for Portable Devices
» Updated Podcast Directory and Download Manager
» Fully Integrated Web browser and customizable links
» New Visualizer Plug-in - Milkdrop 2
» Portable Device Sync support
» Expanded Podcast Directory
» Smart views with new pre-sets for dynamic playlists
» Plays an insane amount of audio and video types
» Compatible with Winamp 2 Plug-ins
» Full Support for Classic Skins
» Full Support for Modern Skins
» Access over 18,000 SHOUTcast Radio Stations
» Enjoy thousands of free songs and videos
» Playback the AOL Video catalogue of video content
» Listen to AOL Radio stations
» Download thousands of Skins and Plug-ins

Features of Pro-version:
» Rips CDs to MP3
» Rips CDs to aacPlus, AAC, WMA
» Rip to HE-AAC
» Burn CDs

New features:
» Improved iPod Sync Support
» New iTunes Library Import
» New Online Services Gallery
» New OurStage Radio Online Services
» New Spinner MP3 of the Day Online Service
» New Turkish, Romanian and Portuguese Language Packs

Changes in Winamp 5.571:
+ New: MPEG-4 video support for in_mp4 & in_flv (Winamp Pro only)
+ New: [in_avi] Native AVI video support (MPEG-4 = Winamp Pro only)
+ New: [in_mkv] Matroska MKV video support (MPEG-4 = Winamp Pro only)
+ New: [ml_addons] Browser for discovering new skins & plugins
+ New: Winamp detection browser plugins for IE & Firefox
+ Improved: Direct3D video rendering
+ Improved: Filetype association handling on Vista & Windows 7
+ Improved: New fullscreen video OSD
+ Improved: Added ReplayGain Preamp control to Prefs (previously .ini only)
+ Improved: VU meter (beat vis) optimizations
+ Improved: [gen_ff] Multithreaded object
+ Improved: [in_flac/in_vorbis] Tag support for Organization field as Publisher
+ Improved: [in_flv] AAC, aacPlus & ADPCM audio support in FLV files
+ Improved: [in_mp4] Support for aacPlus parametric stereo in mp4 container
+ Improved: [in_nsv] Native h.264 decoding (Winamp Pro only)
+ Improved: [in_wave] Unicode filename handling
+ Improved: [ml_history] Play Offset feature for resuming playback of podcasts
+ Improved: [ml_local] Director & Producer fields & columns for videos
+ Improved: [ml_local] Row cache for NDE to vastly speed up queries
+ Improved: [ml_online] Right-click option to open service in new window
+ Improved: [ml_wire] feed:// pcast:// and winamp:// protocol support
+ Improved: [ml_wire] Option to automatically download 'x' most recent episodes
+ Improved: [ml_wire] Redesigned Podcast Directory view
+ Improved: [pmp_usb] Option to set paths in saved playlists
+ Improved: [vis_milk2] Milkdrop2 updated to use ns-eel2 (thanks Justin)
+ Fixed: Custom mldb info reverts to filename on Alt+3 for in_dshow, flv & swf
+ Fixed: Elevator installation and Aero compatibility issues in 5.57 on Windows Vista
+ Fixed: HeapSetInformation not located in kernel32 error under Win2k
+ Fixed: Shuffle feature broken under limited user profiles
+ Fixed: Various other reported issues/bugs/crashes with 5.57
+ Fixed: [gen_ml] Bold text in Local Media views on some systems
+ Fixed: [gen_tray] Compact mode not working on 64-bit OS
+ Fixed: [in_flac] Playback freezing before end of some corrupted files
+ Fixed: [in_flv] Sync issue where video lags behind audio on some flv files
+ Fixed: [in_flv] Various h.263-related crash issues
+ Fixed: [in_mod] Heap overflow security vulnerability (thanks Dyon Balding, Secunia)
+ Fixed: [in_mod] Some s3m files crashing on load
+ Fixed: [in_mp4] Various transcoding issues
+ Fixed: [in_wm] Main window & taskbar menu blocked after closing DRM browser
+ Fixed: [jpeg.w5s/png.w5s] Security vulnerability fixes (thanks Nicolas Joly, VUPEN)
+ Fixed: [ml_local] Remove missing files broken in full rescan
+ Fixed: [ml_wire] feeds.xml sometimes being destroyed
+ Fixed: [pmp_p4s] Crashing with certain devices
+ Fixed: [vis_avs] Compile issues causing some presets to not load properly or crash
+ Misc: Improved Windows 7 compatibility, incl. aero thumbnail & taskbar integration
+ Misc: More general tweaks, improvements, fixes and optimizations
+ Misc: New info page for lang pack developers in About Winamp dialog
+ Misc: New MPEG-4 video support adds h264.w5s & mp4v.w5s
+ Misc: Renamed nsvdec_vp6.dll to vp6.w5s
+ Misc: Removed gen_dropbox from the installer, for now...
+ Misc: Right-click to close Notifier in Bento skin
+ Misc: Some keyboard accelerator fixes (new Ctrl+Alt+B for Add current to bookmarks)
+ Misc: Various installer improvements (including new DirectX version checker)
+ Updated: aacPlus decoder 8.2.2, encoder 8.2.0
+ Updated: Gracenote CDDB/MusicID v2.6.101
+ Updated: libpng 1.2.40
+ Updated: [gen_jumpex] JTFE v1.0.7.1
+ Updated: [in_vorbis] libvorbis 1.2.3 & libogg 1.1.4