ATOI

The main goal we wanted to achieve by writing this plugin was delicate tags appearance tweaking. Now plugin supports tag color and size tweaking, pretty urls, automatic and manual tags and tag cloud output, tag preview and tagged posts count. Such features as tag aliases and search by tag are planned to be implemented in next release.
We are glad to introduce this plugin to the community. If you think that it is necessary and there is need in developing it further, we will do it.
Bug reports and feature requests are welcome.
<h3>Example</h3>
There are 100 posts with tags as your site. 
There are four tags defined: tag1, tag2, tag3, tag4. 
Tag1 has 10 posts, tag2 has 40 posts, tag3 has 20 posts, tag4 has 70 posts (post can have more than one tag). 
There are 3 colors (color1, color2, color3) and 2 sizes defined (10px, 30px). 
So there are 3 color categories and 2 size categories. 
If a tag has less than 33% of tagged posts, it gets into 1st color category. 
If it has more than 33% and less than 66% of tagged posts, in gets into 2nd color category. 
If it has more than 66% of tagged posts, it gets into 3rd color category. 
The same thing with colors. 
So: 
tag1 – 10 posts (10%); color:color1; size:10px; 
tag2 – 40 posts (40%); color:color2; size:10px; 
tag3 – 20 posts (20%); color:color1; size:10px; 
tag4 – 70 posts (70%); color:color3; size:30px;

Xata33 Tag

The main goal we wanted to achieve by writing this plugin was delicate tags appearance tweaking

daill

WP-Cirrus is a plugin that displays a 3D tag cloud in your WordPress. It can be 
used as a widget or anywhere on your blog using the [wp-cirrus] code.
WP-Cirrus was inspired by the famous WP-Cumulus plugin. WP-Cirrus uses no Flash, 
but only JavaScript and CSS to display the cloud. It gets all meta tags directly 
from WordPress.
Our plugin makes no use of external libraries that have to be loaded with it at runtime 
(e.g. jQuery or even Flash). This makes it very small and fast to load.
As it’s still under development more releases will be seen in near future.
Have fun and tell us what you think about it.

WP-Cirrus

A 3D JavaScript tagcloud inspired by WP-Cumulus.

Xata33 Tag vs WP-Cirrus