Google Plus is new Google social sharing tool just as Facebook "likes". As a webmaster, you should start using 'Google Plus One' on your websites. This may help your site to gain more exposure and traffic.
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If you are a Web Developers or Web Designer and want to customize the look and feel of Google +1 button for your websites, here are top 15 Google (plus one) +1 Icon Sets that you can download for free !
Google Plus Icons in PSD
Google Plus (+) Icon Set PNG
Free Google Plus Icons
Freebie Google Plus(+) Circular Icon Set
Freebie: Google+ Icon Set
Google+ Free Iconset in 3D Optik
Google +1 Icons
4 Free Google Plus (+) Icons
Free Google Plus One Icon Vector
Google Plus Free Icon Pack (PNG + PSD)
Free Google Plus Icons Set
Google Plus 3D Button v1.0
Design a Sleek Google+ Icon - Free Google+ Icon Set Download
16 Google Plus One Icon Set
Google Plus Icons Collection
You are most welcome to suggest any additions to this list. You can use the comments box below to make any suggestions.