
kdiff3
Beyond Compare
WinMerge
Meld
Araxis Merge
DiffMerge
P4Merge
Devart Code Compare
Trelby
Final Draft
Scrivener
Celtx
Fade In
Manuskript
Arc Studio Pro
Story Architect (STARC)
kdiff3
TrelbyBeyond Compare - Beyond Compare allows you to compare files and folders.
Final Draft - Use your creative energy to focus on the content; let Final Draft take care of the style.
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
Scrivener - Scrivener is a content-generation tool for composing and structuring documents.
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.
Celtx - Celtx is a scriptwriting software platform with applications in a wide range of mediums but that specializes in helping screenwriters.