PNG SVG PSD EPS MORE
Signs
Flat
Free chaos
Add, plus, more
Black
512x512
Interface and web
symbol, cross, symbols
Soft Icons
more, cross, symbol
GraphicsBay 36 Icons
interface, plus, signs
BigMug Line
signs, symbol, cross
BigMug Solid
sign, addition, Additive
Shades Vol 1
Circular, signs, symbols
Universalicons
Universal Icons, cross, symbols
Freepikons Interface
signs, interface, plus
Mathbert Mathematics
plus, Add, sign
sign, symbol, Add
Sketched Social
Sketch, outline, plus
Essentials
button, square, symbol
Add, sign, signs
Essentials, outline, plus
square, Essentials, Add
Coolicons
more, Cool Icons, symbols
Cool Icons, plus, more
Hand Drawn
plus, Add, Outlined
Basic Application
Add, Add Sign, Plus Button
Icomoon Free 2
Add, signs, cross
Font Awesome
interface, signs, symbols
symbol, symbols, Circular
signs, square, rounded