Actively maintained

Concept

This is a simple module that can be used for communication of site changes/updates between the site designer/developer, and the site owners.

CA Taxonomy provides actions and condition checks for nodes and their taxonomy terms for the Conditional Actions module bundled with Ubercart 6.x-2.0

UC Product Triggers provides triggers for the Conditional Actions module bundled with Ubercart for common product related tasks, such as adding or removing a product from the cart.

Node Theme is used to enable easy switching to another theme based on the path. Any site path can be controlled, not just nodes, but the name is carried over from D6.

This module creates a CCK field that accepts RSS urls.

This module solves the Internet Explorer limitation of loading not more than 31 CSS files per HTML page (http://support.microsoft.com/kb/262161).

The module will only kick in when it is needed, and remain silent otherwise.
This means, as long as Drupal's CSS aggregation is enabled, or your module count is very small, you will not notice any difference.

No configuration needed, just install / enable the module.

Drupal 7

This problem is fixed in Drupal 7 core. Therefore, there will be no Drupal 7 version of this module.

Alternatives

IE CSS Optimizer: It does more or less the same as this module, with some subtle differences in implementation.

As an additional feature, it can aggregate all stylesheets except for those in specified themes or in the modules. Quite convenient, eh?

Advanced CSS/JS Aggregation (afaik) does everything that Unlimited CSS does, and a lot more.

It is definitely heavier, but do you care?

Differences to IE CSS Optimizer