less-watcher is a script that can watch a directory and recompile your .less scripts if they change. It's useful for development as you don't need to think about recompiling your Less files.
It searches in a recursive manner so sub-directories are handled as well.
To install less-watcher via npm simply do:
$ sudo npm install less-watcher
To use less-watcher simply do:
less-watcher -p [prefix] -d [directory] Options: -d Specify which directory to scan. [default: "."] -p Which prefix should the compiled files have? Default is style.less will be compiled to .less.style.css. [default: ".less."] -h Prints help [boolean]
For more info read: http://amix.github.com/less-watcher/