JChecker is using...

WASTE Text Engine
(c)1993-2002
Marco Peovanelli

...Thanks to...

Marco Piovanelli
.
k16(Another HTML-Lint)
Liam Quinn(WDG)
Yasutaka kato(WDG)
Rj
Makopie
Kouichi Mori
Fumihiko Murai
Takeshi Yamamoto
Shuuji Kakuno
BaKE!
Tenasaku
bui
And Others