A CodePen by Paul. Dropdown buttons - Just making this tutoral (http://webdesign.tutsplus.com/tutorials/site-elements/quick-tip-design-a-pretty-dropdown-button-in-photoshop/) a reality. CSS only.

index.html

<div class="share">
	<a href="#">Share</a>
	<div>
		<ul>
			<li><a href="#">google+</a></li>
			<li><a href="#">facebook</a></li>
			<li><a href="#">twitter</a></li>
		</ul>
	</div>
</div>

<div class="share orange">
	<a href="#">Share</a>
	<div>
		<ul>
			<li><a href="#">google+</a></li>
			<li><a href="#">facebook</a></li>
			<li><a href="#">twitter</a></li>
		</ul>
	</div>
</div>

<div class="share yellow">
	<a href="#">Share</a>
	<div>
		<ul>
			<li><a href="#">google+</a></li>
			<li><a href="#">facebook</a></li>
			<li><a href="#">twitter</a></li>
		</ul>
	</div>
</div>

<div class="share black">
	<a href="#">Share</a>
	<div>
		<ul>
			<li><a href="#">google+</a></li>
			<li><a href="#">facebook</a></li>
			<li><a href="#">twitter</a></li>
		</ul>
	</div>
</div>

style.css

body {
	font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
	font-size: 15px;
	font-style: normal;
	font-variant: normal;
	font-weight: 300;
	margin: 15px;
	color: #373737;
}

p {
	margin: 2em 0 1em;
	line-height: 24px;
}

.share {
	position: relative;
	display: inline-block;
}

.share a {
	font-family: Helvetica, Arial, sans-serif;
	font-size: 13px;
	text-decoration: none;
	text-align: center;
	padding: 5px 0;
}

.share > a {
	display: inline-block;
	width: 100px;
	z-index: 1;
	font-weight: bold;
	color: #616267;
	border: 1px solid #8F8F8F;
	border-radius: 3px;
	background: #fff;
	background-image: -webkit-linear-gradient(top, #FAFBFD, #F6F7FC);
	background-image: -moz-linear-gradient(top, #FAFBFD, #F6F7FC);
}

.share > a:hover {
	background: #eee;
	background-image: -webkit-linear-gradient(top, #F4F7FC, #FAFBFF);
	background-image: -moz-linear-gradient(top, #F4F7FC, #FAFBFF);
}

.share div {
	position: absolute;
	width: 100px;
	height: 8px;
	overflow: hidden;
	left: 2px;
	top: 28px;
	-webkit-transition: all 150ms linear;
	-moz-transition: all 150ms linear;
	-o-transition: all 150ms linear;
	transition: all 150ms linear;
}

.share:hover div {
	height: 94px;
	/*
	 * 26px (height of <li>) times the number of <li>s, plus 16px for grippy
	 */
}

.share ul {
	position: absolute;
	bottom: 5px;
	left: 0;
	width: 96px;
	background: #56A0F9;
	background-image: -webkit-linear-gradient(top, rgba(0,0,0,0.15), transparent);
	margin: 0;
	padding: 2px 0 9px;
	border-radius: 0 0 3px 3px;
	border: 1px solid rgba(0,0,0,0.25);
	border-width: 0 1px 1px;
	box-shadow: 0 -1px 0 rgba(255,255,255,0.5) inset;
	z-index: 9999;
}

.share ul::before {
	content: '.';
	text-indent: -9999px;
	display: block;
	background: #56A0F9;
	width: 15px;
	height: 15px;
	position: absolute;
	bottom: -4px;
	left: 38px;
	border-radius: 15px;
	box-shadow:
		0 -1px 0 rgba(255,255,255,0.5) inset,
		0 1px 0 #666;
	z-index: 0;
}

.share ul::after {
	content: '.';
	text-indent: -9999px;
	display: block;
	background: #fff;
	width: 5px;
	height: 5px;
	position: absolute;
	bottom: -2px;
	left: 42px;
	border-radius: 15px;
	border: 1px solid #666;
	box-shadow: 0 -1px 0 rgba(255,255,255,0.5);
	z-index: 0;
}

.share.orange ul {
	background: #FF8100;
}

.share.orange ul::before {
	background: #FF8100;
}

.share.yellow ul {
	background: #B4E12C;
}
.share.yellow ul::before {
	background: #B4E12C;
}

.share.black ul {
	background: #2C2D32;
}
.share.black ul::before {
	background: #2C2D32;
}

.share:hover ul {
	bottom: none;
}

.share ul li {
	list-style: none;
	margin: 0;
	padding: 0;
}

.share ul li a {
	display: block;
	color: #fff;
	text-shadow: 0 1px 0 rgba(0,0,0,0.25);
}

.share ul li a:hover {
	text-decoration: underline;
}