PNG ICO ICNS MORE
Desktop apps
Flat
Metro UI Dock
linux
Gold
512x512
PNG MORE
UI
Glyph
Windows 8 icons
Client, linux
DarkSlateGray
26x26
Pixel
Windows 8 Pack (Metro Style)
linux, Client
Social media
Social Media Stamps
photobucket, base, linux
94x94
Smooth
Farm-fresh
linux, download, for
Black
32x32
Mixed
IconSweets 2
expression engine, linux, tux
40x40
File, document, Penguin
Files & folders
Leox Graphite
system, linux
32 Pixel Social Media Icons
WhiteSmoke
Avatars & smileys
Cartoon
Zoom-eyed creatures 2
pengiun, linux, Animal
256x256
Computer & hardware
3D
Programmers pack vol. 1
linux, tux
128x128
Sports & awards
Fight club
Animal, tux, linux
CadetBlue
Discovery
Free Applications Icons
open, software, Animal
24x24
Human o2
linux, start, Ubuntu
165x165
Debian, linux, Configure
Silver
Family & home
Kids
Penguin, Animal, linux
Crystal Project
Photography & graphic design
Dark Glass
Msn, linux
Computer, linux
KDE Crystal Diamond
Debian, linux
Crimson
Comment, linux
16x16
Antivirus, syringe, linux
22x22