Random Tag Cloud allows you to display your site’s tags. It works just like a regular tags cloud, but you can customize it. If you set, it gets your tags by selecting randomly.
Of course, you can set other settings; font sizes, number of tags to display, how to order etc.
Now, you can add a link to your tags archive page by writing its ID. It adds a ‘Show All Tags’ link.
Free Download: Download this wp-plugin