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Business
Flat
Management
document, Archives, Agree
Black
512x512
Gestures
General UI
Like, Hand, thumb
Interface
Basicons
Check, tick, Agree
Font Awesome
Like, thumb up, thumb
Universal 03
interface, Agree, document
social
WebDev SEO
work, deal, meet
approval, approve, thumb
Typicons
Gestures, Hand, Agree
Arrows
Entypo
yes, Agree, confirm
done, Gestures, Agreement
Education
Agreement, Hands, Agree
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Max Mini Icon
Agree
16x16
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Education & science
Outline
Miscellaneous
Agree, success, Like
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Signs & symbols
Conversation
send, Conversation, Agree
Agree, Chat, Answer
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iOS7 optimized
Social Media
thumbs-up, Communication, Agree
Glyph
social-network, ok, thumbs-up
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Social media
Handdrawn
Jolly Icons Free – 36 Hand-Drawn UI Icons
Agree, Up, hand drawn
64x64