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Computer & hardware
Smooth
Flat Round System
Sabayon
MidnightBlue
512x512
Sidux
DarkRed
Solaris
Chocolate
Slackware
SteelBlue
Slax
YellowGreen
Symbian
DarkCyan
Tizen, Samsung
Signs & symbols
Social Flat Rounded Rects
Simple note, Simplenote
Scribd
DarkSlateGray
slash dot, slashdot
Teal
Smugmug
Slide share, Slideshare
CadetBlue
sound cloud, Soundcloud
OrangeRed
Snap chat, Snapchat
Gold
Square space, Squarespace
Spotify
Squidoo
DarkOrange
Surfing bird, Surfingbird
DodgerBlue
Stumble upon, Stumbleupon
swarm
Goldenrod
store, windows
DeepSkyBlue
Desktop apps
System Shade Circles
OliveDrab