Similar to Maxthon
.sc
.sc.sd
.sd.se
.seSession Description Protocol
Session Description Protocol.sg
.sg.sh
.shShadow DOM
SHIPS.TV
Shopkick
Shopkick.sk
.skSketch
Skype
SkypeSlideShare
SlideShareSmart.fm
Smart.fmSMTPS
SMTPSSpread Firefox 2006 Summer
SPYSEE
STARTTLS
Opportunistic TLS.sv
.sv.sx
.sx.sz
.sz.taipei
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TechWave
.tf
.tf.tg
.tg.th
.th.tj
.tj