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
PNG ICO ICNS MORE
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
IcoMoon
32x32
Wireframe mono icons
48x48
checkmark, round