Shared Contacts For GMail - Share contacts and address books with your team in Google Workspace, previously known as G Suite, Gmail, or your mobile Contact app, just like you share Google docs!
Beyond Compare - Beyond Compare allows you to compare files and folders.
Listium - Share your lists
WinMerge - WinMerge is an open source differencing and merging tool for Windows.
Airstory - Airstory is a writing tool that enables bloggers, writers, students and subject matter experts to write better.
Meld - What is Meld? Meld is a visual diff and merge tool targeted at developers.