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Mixed
Outline
Free Daily Icon Set
Circle, tick, okay
Black
512x512
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Random - Crafticons
Misc, tick
Flat
Flat Design Icons (Set 2)
tick, approve, Accept
Lavender
Handdrawn
Social Messaging & Productivity
yes, ok, tick
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Smooth
48px web iconset
tick, Badge
OliveDrab
48x48
iVista 2
tick
256x256
Simple But Sophisticated App
DarkSlateGray
64x64
Basic Set
tick, mark, yes
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Pixel
Mini icons 2
ok, Check, tick
10x10
3D
Flavour Extended
ok, tick, Check
ForestGreen
Check, Accept, success
16x16