Video DownloadHelper - Browser extension to download videos from the Web

OpenSubtitles.org - OpenSubtitles.org was developed for easy downloading and uploading subtitles for movies.

FlashGot - FlashGot is a browser extension for Mozilla Firefox that is designed to make it easy to download a whole batch of files in one go. The extension is open source and free to use, but it is no longer compatible with the most recent version of Firefox.

SubDownloader - SubDownloader - Fast and Easy Subtitle Downloader

ClipGrab - A friendly downloader for YouTube and other sites

SubiT - With SubiT, you can download subtitles to your favorite movies and serieses, with a simple click.