animate.css/source/rotateInDownLeft.css

@-webkit-keyframes rotateInDownLeft {
	0% {
		-webkit-transform-origin: left bottom;
		-webkit-transform: rotate(-90deg);
		opacity: 0;
	}
	
	100% {
		-webkit-transform-origin: left bottom;
		-webkit-transform: rotate(0);
		opacity: 1;
	}
}

@-moz-keyframes rotateInDownLeft {
	0% {
		-moz-transform-origin: left bottom;
		-moz-transform: rotate(-90deg);
		opacity: 0;
	}
	
	100% {
		-moz-transform-origin: left bottom;
		-moz-transform: rotate(0);
		opacity: 1;
	}
}

@-o-keyframes rotateInDownLeft {
	0% {
		-o-transform-origin: left bottom;
		-o-transform: rotate(-90deg);
		opacity: 0;
	}
	
	100% {
		-o-transform-origin: left bottom;
		-o-transform: rotate(0);
		opacity: 1;
	}
}

@keyframes rotateInDownLeft {
	0% {
		transform-origin: left bottom;
		transform: rotate(-90deg);
		opacity: 0;
	}
	
	100% {
		transform-origin: left bottom;
		transform: rotate(0);
		opacity: 1;
	}
}

.rotateInDownLeft {
	-webkit-animation-name: rotateInDownLeft;
	-moz-animation-name: rotateInDownLeft;
	-o-animation-name: rotateInDownLeft;
	animation-name: rotateInDownLeft;
}