Posts Slideshow Widget
Post Slideshow Widget WordPress plugin allows you to setup a side bar widget with slider (slideshow) of featured images from recent posts (or custom post type), from a selected category (hierarchical taxonomy for selected custom post type), from comma separated list of tags.
If post has no featured image, plugin tries to extract any 1st image from that post content and show it instead.
You may customize post title and background color, background color of slider navigation panel. Color is selected from WordPress built-in color pallete. Manual input of color code is available also. Select animation type: slide or fade. Setup slider speed and widget dimensions. You can have as many sliders as you wish with different categories selected. This is mainly useful if you have a dedicated category for photo gallery posts and would like to display recent post title with its featured photo.