About this project, from SourceForge

Forta is a free editor for video subtitle.
You can easily create, sync, translate, adjust subtitle lines.

Features:
Adjust display time
Aggressive linebreak
Create/adjust/sync/translate subtitle lines
Merge short lines / split long lines
Visually sync and/or adjust a subtitle
Convert between 40+ formats
Save personal settings
Full formatting
Automatically saving
Check overlaps
Coloring short reading lines
Coloring every line longer than 37(or more) letters

Screenshots