PNG ICO ICNS SVG MORE
Signs & symbols
Glyph
Web UI
Checkbox, confirm, Approved
Black
512x512
navigation icons
checkmark
Arrows
Navigation Set - Arrows, Part One
done, Check, check circle
done, Check, square
UI
iOS Tab Bar
complete, done, Circle
ok, Circle, done
GlyphPack
Circle, checkmark
PNG SVG MORE
square, checkmark
Very Basic. Android L (Lollipop)
done, check mark, good
Free basic
Accept, checkmark, Check
DarkSeaGreen
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Windows 8 metro style
Business & finance
FatiCons
done, checkmark, Available
Computer & hardware
Ionicons
Circled, checkmark
round, checkmark
checkmark, Empty
Gentle Edges Icon Set
Check, checkmark
128x128
Mixed
Pittogrammi
correct, checkmark
Flat UI Icons Free
yes, Check, checkmark
PNG MORE
Windows 8 icons
DarkSlateGray
26x26
IcoMoon
32x32