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Mixed
Glyph
Material Core
Circle, Check
Black
512x512
Check, Circle
PNG SVG MORE
Check
Files & folders
AwesomeFolders
Folder, Check, exclamation
Geomicons
Network & communications
Communication & Technology
ok, speech bubble, Bubble
Octicons
384x512
Travel & hotels
Meanicons
meanicons, ok, okay
buy, store, Add
AIGA Symbol Signs
hanger, Check, Coat
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Business & finance
Gentle Edges Icon Set
Check, checkmark
128x128
Windows Metro
48x48
Flat UI Icons Free
yes, Check, checkmark
Check, Accept, yes
PNG MORE
Minicons Free
mark, Check
43x43
44x44
UI
Mimi Glyphs
Check, mark
16x16
Glyph set
yes, ok, Check
160x160
Arrows
DefaultIcon ver 0.11
Check, done
258x258
IconSweets
50x50
Music & multimedia
Iconic
32x32