Touch Slider is very easy to use with articles. Wordpress works with touch sliders very well. You can simply add multiple images for touch slider.
Image posts are unique post types for displaying your images. You can use image post types for your image based articles
Video posts are unique post types for displaying your video. You can use video post types for your video based articles
Wordpress now supports Twitter Embeds. You can easily add your Twitter. All you need to do is to add your Twitter Status link into the text area.