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Desktop apps
3D
Free Social Media Icons
Shop, Check, offer
Gainsboro
512x512
Service, Check, buy
SteelBlue
Photography & graphic design
32x32 Free Design Icons
yes, mark, Apply
Black
32x32
Boxes, Check
yes, ok, good
ForestGreen
mark, checking, spell
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Travel & hotels
Glyph
AIGA Symbol Signs
hanger, Check, Coat
Business & finance
Gentle Edges Icon Set
Check, checkmark
128x128
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UI
Smooth
Snipicons
Check
DarkSlateGray
Mixed
Windows Metro
48x48
Flat UI Icons Free
yes, Check, checkmark
Check, Accept, yes
Signs & symbols
Free 3d Glossy Interface Icon Set
yes, mark, validation
64x64
checkmark, Accept, Check
LimeGreen
80x80
yes, ok, Check
Lavender
PNG MORE
Computer & hardware
Crystal Project
macro, stock, Brackets
24x24
macro, stock, Check
SlateBlue
16x16
Minicons Free
mark, Check
43x43
44x44
Blue Bits Basic and Bonus
ok, yes, Check
256x256
Email, Check, ok
Check, user
Check, Folder
photo, Check, image