We found wordpress best sidebar random post plugin: Special recent posts, you can display your posts with thumbnails in the blog sidebar, and easily set up awesome layout.
Special recent posts provide 40+ Customization Options to set up your layout, you can define the title length, thumbnail size, post offset, display post number, etc. Only a few clicks, you can easily achieve their desired effect. About 40+ Customization Options, Author online Documentation give detailed introduction.
Plugin Author: Luca Grandicelli