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UI
Outline
Feather
Add, square
Black
512x512
Add, Circle
Arrows
Slim Square Icons - Basics
Add, plus
Social media
Significon - Social
plus, Google+, G+
Wirecons Free Vector Icons
plus, new, Add
divide, math, plus
Mixed
Eightyshades
Add
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Touch gestures
Open Source Gesture Library
stroke, Add, Gestureworks