Aegisub is an advanced subtitle editor for Windows, and UNIX-like systems, such as Linux, Mac OS X and BSD. It is open source software and free for any use.Discontinued
The project is no longer developed. Last version, 3.2.2, released in December 2014, can still be downloaded from the official site and GitHub.
Aegisub vs Subtitle Edit opinions
Lots of important Subtitle Edit features are missing in Aegisub
the controlls for changing the timing are horrible and scrolling between frames are difficult as well
Movie subtitle editing and creation tool. Supports and converts between various subtitle formats. Features include video preview, a translator mode, several features to fix or optimize timing issues, errors in spelling or text format, etc.
Subtitle Editor is a GTK+3 tool to edit subtitles for GNU/Linux/*BSD.Discontinued
Latest release was on July 14, 2017.
Subtitle Editor vs Subtitle Edit opinions
Maybe not as complete, but it has the same basic functions, like editing, subtitle sync (move subtitles), support for video player and waveform, translation, framerate switch, grammar tools, etc. For me, Subtitle Editor works much better on Linux than SubtitleEdit and it's better than Gaupol.
A text-based subtitles editor that supports basic operations as well as more advanced ones, aiming to become an improved version of Subtitle Workshop for every platform supported by KDE.
Gaupol is an editor for text-based subtitle files. It helps you with tasks such as creating and translating subtitles, timing subtitles to match video and correcting common errors. Gaupol includes a built-in video player and also supports launching an external one.
Preparing subtitles and captions for video used to be a long and cumbersome process, but with titlebee the task has been made simpler and quicker by letting the subtitler focus on adding subtitles visually onto a timeline.
Jubler is a tool to edit text-based subtitles. It can be used as an authoring software for new subtitles or as a tool to convert, transform, correct and refine existing subtitles. The most popular subtitle formats can be used.
Jubler vs Subtitle Edit opinions
Amara (formerly Universal Subtitles or unisubs) gives individuals, communities, and larger organizations the power to overcome accessibility and language barriers for online video. The tools are free and open source and make the work of subtitling and translating video simpler...