Tag clouds are a popular way of showing lists of many entries while indicating the relative popularity of each. Some blog platforms, like Wordpress, already have add-ins that let you create tag clouds. But if you're using a blog platform that doesn't support this, or you have your own site, you're own your own to create your own tag cloud.

ZoomClouds, found at http://zoomclouds.egrupos.net/, aims to make it easy to create tag clouds on all blog platforms. If your platform or site supports RSS you can use their service to automatically create a tag cloud. You get to configure your cloud's look and feel, as well as the data that goes into the cloud. They give you a small piece of HTML to put on your site and then that piece of HTML gets turned into your tag cloud, and it gets updated based on the data on your RSS feed. All for free.