It supports captions, HTML elements and videos and it's validated in HTML5 (have a look)

Camera slideshow provides many options to customize your project as more as possible

It's completely free (even if a donation is appreciated)

Different color skins and layouts available, fullscreen ready too

Camera is a responsive/adaptive slideshow. Try to resize the browser window

It uses a light version of jQuery mobile, navigate the slides by swiping with your fingers