Greenfish Subtitle Player

 Greenfish Subtitle Player plays .SRT files in a partially transparent window which can be laid over a video player. For instance, it enables you to watch online streaming videos with subtitles. Rewind and Fast Forward buttons allow you to easily synchronize subtitles with video. Greenfish Subtitle Player is cross-platform (works fine on Windows, Linux and Mac), but you will need to have Microsoft .NET Framework 4.0 or Mono installed.