I use foobar2000 on windows and KMPlayer are synchronized with the TTPlayer LRC lyrics plugin
linux http://bbs.chinaunix.net/thread-1923770-1-1.html
It can search online or to download. lrc file playback
Can be used to sing

http://zh.wikipedia.org/zh-tw/LRC
Have introduced server database LRC lyrics
LYRDB LRC Karaoke Database
lrcDB Lyrics Database
LRC Lyrics Database
LRC Lyrics Center
LYRDB, An extensive lyrics database
Portal LRC, a Brazilian lyrics web site with over 3000 LRC's
Lyricsfly API, database of lyrics with REST XML API access
Tutorial - Creating lyrics using LRC Editor
Lrceditor-Amarok, a GNU / Linux lrc editor against amarok

Chinese LRC Lyrics Search
http://lrc.aspxp.net/
http://www.cnlyric.com/html_zmsy/N.html
I think that is the same way TUNE WIKI synchronized lyrics