Internet resources

Vortex Project - http://vtx.microfor.ru/ is unavailable :(: Site is dedicated to Vortex Plug-In for Winamp v2.00+. This plug-in can to play *.vtx files by emulating AY-3-8910/12 and YM2149 sound chips.
Leonard Homepage: Arnaud Carre home page. He is YM-format author. There are music of this format, famous ST-Sound emulator for its playing, and also some programming articles on his page.
Z80Stealth Emulator Homepage: Official page of Z80Stealth ZX Spectrum emulator by Kirill Kolpakov. This is the best AY/YM emulation today (© Hacker KAY). Emulator allows efficient creating of PSG and EPSG files. Among all of known to me emulators, only Z80Stealth creates PSG files without errors.
Hacker KAY Homepage: Hacker KAY home page. He is original AY/YM emulation algorithm author (used in Z80Stealth). On his page you can find archive of his ZX modules (Russian titles, I translated it to English in Tr_Songs) and AY/YM related data and programs, some MP3 and modules, guest book.
Project AY: Site is dedicated to .AY-files and .AY-files players and utilities. You can find many techinfo and links about chip music.
AY Music Utilities: This is AY music part of World Of Spectrum site.
Power of Sound: Power of Sound group from Izhevsk site. There are many ZX Music modules and also AY-player and ripper for ZX Spectrum called "Pusher", ASC to PT3 converter, etc.
RDOSPLAY - http://sorry.vse.cz/dimension/rdos/rdosplay/ is unavailable :(: Site is dedicated to OPL2/OPL3 player. There are some AYM and FXM ZX Spectrum tunes can be found on this site. RDOSPLAY documentation contains useful info and formats description.
YM2149 Java emulator: Good emulation of YM2149 sound chip is written on Java.
ExoticA! *** Tunes - AY-3-8912_songs *** ExoticA!: ExoticA! site part, on which placed AY-files in native form. Some of them very interested.
Vorc: Chip music last news. There info about AY/YM music can be found too.
RaWW.org: ZX Spectrum world news. Sometime can be found useful info about AY-3-891x music
z00m's speccy corner - AY Chip page: This is part of z00m's speccy corner. There are many useful information about AY and Speccy, and also several music archives.
AY Player for real Spectrum: Project is dedicated to playing Spectrum music in .AY (ZXAYEMUL) format on real ZX Spectrum. Current version allows play the most of available AY-files with spectrum music inside.
SNDH-files Player Home Page: Big SNDH music archive (can be played in my Micro ST) and SND Player for real Atari ST.
SNDH Atari ST YM2149 collection: All around SNDH: technical documentation, players and the most complete and well sorted SNDH-files archive.
AY/YM Emulation Library: The page is dedicated to Alexander Sashnov's AY/YM Emulation Library with samples like a plug-in for XMMS (Linux's Winamp analog) and console player for playing VTX-files in Linux. The library is based on Roman Scherbakov's (VTX format author) sources.
HDS: Tumen ZX Spectrum creative group site. There is an AY-related part Download / Music.
Games using YMEngine - http://www.yourline.ru/~gmr/roomten.zip, http://www.yourline.ru/~gamemaster/games/sits/sits.exe are unavailable :(: New games with AY-music via YMEngine. Thanks to Denis Grachev for links and games!
mR T.A.D. a.k.a. rnR: Site of musician, interested in computer sound and in all my projects.
C-jeff: Famous ZX Spectrum AY-musician Dmitry Zhemkov's site. There are fresh AY-albums on the site.
MMCM: Legend of ZX Spectrum AY-music, Sergey Kosov's site. Well known MMCM music style in his last works and of course in his old good AY-musics can be found on site.
X-agon's Hompage: AY-musician X-agon's site. Download all his ZX Spectrum music!
Factor6 Computer World: Well known AY-musician Factor6. Full collection of his music with author's comments.
UBIKTUNE: Main idea of the site is to publish modern ZX Spectrum music in all popular formats: original, emulators and MP3 recorded from real hardware. For the moment several albums (including Turbo-Sound device) are available for downloading.
AY Riders: International ZX Spectrum music band of Yerzmyey.
YM Rockers: Atari ST music band. Brothers of AY Riders ;)