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Mixed
Glyph
Flat UI Icons Free
Check, Accept, yes
Black
512x512
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Signs & symbols
3D
Free 3d Glossy Interface Icon Set
yes, mark, validation
64x64
Accept, ready, tick
Computer & hardware
Smooth
Blue Bits Basic and Bonus
ok, yes, Check
256x256
Glyph set
yes, ok, Check
160x160
Business & finance
Refresh CL
shield, Firewall, Check
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UI
Gnome Web Icons
yes, ok, tick
Must Have
yes, ok, positive
Ultimate Gnome
Pixel
Lynx Black
yes, gtk
24x24
PNG MORE
Desktop apps
Free Applications Icons
ok, success, Accept
red, tick, yes
Check, Accept, green
3D Cartoons III
ok, Check, selected
128x128
Shopping & e-commerce
Woothemes Ultimate Icon Set
yes, ok, checkmark
Crystal Project
Clean, yes, correct
Crystal Clear
on, select, correct
ok, good, yes