PNG ICO ICNS MORE
Social media
Flat
Buttonz
Buttonz, Skype
DarkTurquoise
256x256
PNG ICO ICNS SVG MORE
WinDev Contacts - free
Skype, Chat, Message
LightSeaGreen
512x512
PNG MORE
Mixed
Simply 8-bits #11
Skype
DodgerBlue
96x96
Desktop apps
Appicns
Skype, appicns
DeepSkyBlue
513x513
Mobile apps
Squareplex
RoyalBlue
Plex for Android
Circular icon set
Black
Funky - free
LightSkyBlue
UI
Metro UI Icon Set
Round Simple Social Icons
MediumTurquoise
58x58
Metro UI Dock
Mirror, Skype
640x640
Somacro social media icons
500x500
Colourful Social Media Icons
LightGray
64x64