kdiff3
Beyond Compare
WinMerge
Meld
Araxis Merge
DiffMerge
P4Merge
Devart Code Compare
TransferChain
Dropbox
BLAZE Transfer
Wormhole.app
Beeble
Internxt Send
WeTransfer
Papermark
kdiff3Beyond Compare - Beyond Compare allows you to compare files and folders.
Dropbox - Online Sync and File Sharing
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
BLAZE Transfer - Send big files securely with BLAZE Quantum-Safe encryption
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.
Wormhole.app - Wormhole lets you share files with end-to-end encryption and a link that automatically expires.