Artiss Twitter Data (previously Simple Twitter Data) uses the Twitter API to return basic user data.
It has been tested and been found valid from PHP 4 upwards.
Please note, however, that the minimum for WordPress is now PHP 5.2.4. Even though this plugin supports a lower version, I am not coding specifically to achieve this - therefore this minimum may change in the future.
Each field has to be found in the XML returned from Twitter - the more you request the more time it takes the plugin. Therefore requesting ONLY those that you require ensures maximum plugin efficiency.
You can also use the shortcode [twitter-data] - it works just the same as [twitter] with the same parameters.