OpenSubtitles.org
OpenSubtitles.org was developed for easy downloading and uploading subtitles for movies. It supports some unique functions:
download/upload/search subtitles by OSDb protocol using special Hash
biggest multi-language subtitle database (website available in more than 30 languages)
no registration needed to download or upload subtitles
advanced search (by genre, imdb rating, year...) search for more than one language
search for many subtitles simultaneously
get search results by mail or rss/atom
site is "open" (you can get every page as XML)
support for third party applications (no need to visit webpage for downloading subtitles) can act as a subtitle server for other subtitle sites
