Edit in JSFiddle

<div id="buttons">
<div class="facebook button">
<i class="icon">
<i class="icon-facebook">
</i>
</i>
<div class="slide">
<p>
facebook
</p>
</div>
<iframe src="//www.facebook.com/plugins/like.php?href=http%3A%2F%2Fdevelopers.facebook.com%2Fdocs%2Freference%2Fplugins%2Flike&send=false&layout=button_count&width=80&show_faces=false&font&colorscheme=light&action=like&height=20&appId=568581339861351" scrolling="no" frameborder="0" style="border:none; overflow:hidden; width:80px; height:20px;" allowTransparency="true">
</iframe>
</div>

<div class="twitter button">
<i class="icon">
<i class="icon-twitter">
</i>
</i>
<div class="slide">
<p>
twitter
</p>
</div>
<a href="https://twitter.com/share" class="twitter-share-button" data-via="mariuCSS">
Tweet
</a>
<script>
!function(d,s,id){
var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';
if(!d.getElementById(id)){
js=d.createElement(s);
js.id=id;
js.src=p+'://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs');
</script>
</div>

<div class="google button">
<i class="icon">
<i class="icon-google-plus">
</i>
</i>
<div class="slide">
<p>
google+
</p>
</div>
<!-- Place this tag where you want the +1 button to render. -->
<div class="g-plusone" data-size="medium">
</div>

<!-- Place this tag after the last +1 button tag. -->
<script type="text/javascript">
(function() {
var po = document.createElement('script');
po.type = 'text/javascript';
po.async = true;
po.src = 'https://apis.google.com/js/plusone.js';
var s = document.getElementsByTagName('script')[0];
s.parentNode.insertBefore(po, s);
}
)();
</script>
</div>

<div class="linkedin button">
<i class="icon">
<i class="icon-linkedin">
</i>
</i>
<div class="slide">
<p>
linkedin
</p>
</div>
<script type="IN/Share" data-counter="right">
</script>
<script src="//platform.linkedin.com/in.js" type="text/javascript">
lang: en_US
</script>
</div>
</div>

<style type="text/css">

@import url(http://fonts.googleapis.com/css?family=Open+Sans:400);

@import "//netdna.bootstrapcdn.com/font-awesome/3.0/css/font-awesome.css";

html, body {
min-height: 100%;
}

body {
background-image: linear-gradient(45deg, rgba(194, 233, 221, 0.5) 1%, rgba(104, 119, 132, 0.5) 100%), linear-gradient(-45deg, #494d71 0%, rgba(217, 230, 185, 0.5) 80%);
margin: 0;
}

#buttons {
border-radius: 5px;
padding: 14px 7px;
background: white;
width: 660px;
overflow: hidden;
margin: 150px auto 0;
box-shadow:0 2px 3px rgba(71, 71, 71, 0.31);
}

.button {
background: #DCE0E0;
position: relative;
display: block;
float: left;
height: 40px;
margin: 0 7px;
overflow: hidden;
width: 150px;
border-radius: 3px;
-o-border-radius: 3px;
-ms-border-radius: 3px;
-moz-border-radius: 3px;
-webkit-border-radius: 3px;
}

.icon {
display: block;
float: left;
position: relative;
z-index: 3;
height: 100%;
vertical-align: top;
width: 38px;
-moz-border-radius-topleft: 3px;
-moz-border-radius-topright: 0px;
-moz-border-radius-bottomright: 0px;
-moz-border-radius-bottomleft: 3px;
-webkit-border-radius: 3px 0px 0px 3px;
border-radius: 3px 0px 0px 3px;
text-align: center;
}

.icon i {
color: #fff;
line-height: 42px;
}

.slide {
z-index: 2;
display: block;
margin: 0;
height: 100%;
left: 38px;
position: absolute;
width: 112px;
-moz-border-radius-topleft: 0px;
-moz-border-radius-topright: 3px;
-moz-border-radius-bottomright: 3px;
-moz-border-radius-bottomleft: 0px;
-webkit-border-radius: 0px 3px 3px 0px;
border-radius: 0px 3px 3px 0px;
}

.slide p {
font-family: Open Sans;
font-weight: 400;
border-left: 1px solid #fff;
border-left: 1px solid rgba(255,255,255,0.35);
color: #fff;
font-size: 16px;
left: 0;
margin: 0;
position: absolute;
text-align: center;
top: 10px;
width: 100%;
}

.button .slide {
-webkit-transition: all 0.2s ease-in-out;
-moz-transition: all 0.2s ease-in-out;
-ms-transition: all 0.2s ease-in-out;
-o-transition: all 0.2s ease-in-out;
transition: all 0.2s ease-in-out;
}

.facebook iframe {
display: block;
position: absolute;
right: 16px;
top: 10px;
z-index: 1;
}

.twitter iframe {
width: 90px !important;
right: 5px;
top: 10px;
z-index: 1;
display: block;
position: absolute;
}

.google #___plusone_0 {
width: 70px !important;
top: 10px;
right: 15px;
position: absolute;
display: block;
z-index: 1;
}

.linkedin .IN-widget {
top: 10px;
right: 22px;
position: absolute;
display: block;
z-index: 1;
}

.facebook:hover .slide {
left: 150px;
}

.twitter:hover .slide {
top: -40px;
}

.google:hover .slide {
bottom: -40px;
}

.linkedin:hover .slide {
left: -150px;
}

.facebook .icon, .facebook .slide {
background: #305c99;
}

.twitter .icon, .twitter .slide {
background: #00cdff;
}

.google .icon, .google .slide {
background: #d24228;
}

.linkedin .icon, .linkedin .slide {
background: #007bb6;
}
</style>