
kdiff3
Beyond Compare
WinMerge
Meld
DiffMerge
Araxis Merge
P4Merge
Devart Code Compare
Writebox
WriteNext
Stashany
Calmly Writer
Cold Turkey Writer
Crossnote
JDarkRoom
SSuite NoteBook Editor
kdiff3
WriteboxBeyond Compare - Beyond Compare allows you to compare files and folders.
WriteNext - The writing application that boosts your writing. Increase focus and writing performance and reduce distractions by separating your creative writing from other activities. Let writing be the only activity you perform in the writing application.
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
Stashany - Online notepad for developers
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.
Calmly Writer - Distraction-free text editor for Mac, Windows, Linux and ChromeOS.