General Resources:
bach-cantatas
Belkin'sBooks
classical.net
ClassicalCDReview
ClassicalMusicPages
ClassicsToday
composition tips
CCME
cpdl(ChoralWiki)
FurtwänglerLink(compiled by Yen, Jui-Yuan)
EarlyMusic
EarlyMusicInstruments
EserverMusic
Gramophone
GroveDictionary
imslp 
music-dictionary
medieval.org
musictheory
musicweb
OperaGlass
OperaToday
PianoWizard
RecMusic(with Lied texts)
Teoria(music theory)
ThemeFinder
wima(Icking)
Internet order
amazon
(music
uk
ca
de
fr)
arkivmusic
berkshire
ChinaMusicBookHouse
ClarionInsurance
froogle
mdt
prestoclassical
sheetmusicplus
overstock.com
tower
Downloads: art-mall.com.tw karadar.com (also karadar.it) (for librettos and mp3s etc.) , mp3 download • AMClassical ClassiCat
Libretti and Scores:
naxos
WarnerClassicsSungTexts
Opera Glass
Some libretti in Russian
Les Huguenots piano score
Handel Alessandro libretto
Handel Lotario libretto
Web radio: BBC (live) DiscoveringMusic KBYU-FM KUSC PRT IC975 WPR WQXR WGUC allclassical
Publishers: HenleVerlag ModeRecords Music and Arts Schirmer
Composers: componisten.net JSBach.org MozartForum Karlheinz Stockhausen (a will-be-complete set of Stockhausen on CD can be purchased from here) unofficial Stockhausen Tyzen Hsiao (and here) Unheard Beethoven Wagner
Performers: Alfred Brendel (and his Official page) Wilhelm Furtwängler Grigory Sokolov
Local Music: Utah music dept Utah Opera Utah Symphony Kingsbury Hall Day Murray Music Daynes Music Charles Liu
Genoveva, an NYT article.
fun:
Cremona violins thrill virtuosos
Stradivarius tops auction record
Michael Tanner's review of recordings of Der Ring
Imy Fujita
Charles Ives on composers: "Richie" Wagner's "false nobility".
Debussy: "a city man with his week-end flights into country esthetics".
Chopin was "soft ... with a skirt on."
Ravel was "weak, morbid, and monotonous."
Stravinsky's Firebird kept "going over and over and it got tiresome."
Mozart was "effeminate" and "a bad influence on music."