pyitasa
Easy downloader for subtitles published by Italian Subs Addicted, written in Python, with cache. Easy implementation, easy to use. Just edit the username and the password inside the script, and call it with names of the episodes you want to download.
Example:
./pyitasa.py "/home/media/Serie/Lie to me/Lie to me - 03x02 - The Royal We.avi"
More informations and source code at Google Code Project: pyitasa