'YIFY subtitles' has a wide range of movies across languages. The site comes with a nice interface that makes a selection of your desired movies suitable easy. While downloading, the interface takes you to a PDF page, which is a bit tricky.
This website has a plethora of subtitles for your favorite movies. It has a very simple and obsolete interface. You can download various movie subtitles like the Harry Potter series. It also contains Ads at the top of the page.
This site contains movie subtitles only. Ads are pretty annoying and distracting from the page content. For watching DivX/XviD movies with subtitles on Windows Media Player, you need to install a filter called DirectVobSub. As the files are zipped with WinZip, you need to extract them after downloading them.
Here is another website for serving your purpose. With Addic7ed, you can use subtitles for TV shows and movies alike. The site has options for signing up, though you can download the subtitles without registering. You got to scroll down to see the list. 2b1af7f3a8