PNG MORE
Desktop apps
Flat
Plex for Android
Tumblr
RoyalBlue
96x96
PNG ICO ICNS MORE
Circular icon set
Black
256x256
PNG ICO ICNS SVG MORE
Social media
Funky - free
DarkSlateGray
512x512
UI
Metro UI Icon Set
Metro UI Dock
Minimalist Social Media Icons
DarkSlateBlue
Tumblr, Mirror
640x640
Mirror, Tumblr
Retro icons
AntiqueWhite
60x60
Somacro social media icons
500x500
Social Media Bookmark
LightSlateGray
143x143