rfair404

Simple LESS makes it easy to start using LESS. It adds the required files and will enqueue your theme’s theme.less file if it exists.

Simple LESS

A simple way to start using LESS in your theme. Just add a file named theme.less to your active theme's directory.

Ari Stathopoulos

Dimitris Kalliris

Unyson

This is a simple plugin that loads the Less.php and scssc classes and makes them available to other plugins and themes. 
When activated this plugin will not do anything. 
It has no functionality on its own, but can be used as a dependency for other plugins & themes.
Includes the Less.php class from http://lessphp.gpeasy.com/ and scss from http://leafo.net/scssphp/

Less PHP Compiler

Includes the less.php preprocessor so that it may be used by other plugins or themes.

Simple LESS vs Less PHP Compiler