What’s the best visual merge tool for Git? [closed]

What’s the best tool for viewing and editing a merge in Git? I’d like to get a 3-way merge view, with “mine”, “theirs” and “ancestor” in separate panels, and a fourth “output” panel.

Also, instructions for invoking said tool would be great. (I still haven’t figure out how to start kdiff3 in such a way that it doesn’t give me an error.)

My OS is Ubuntu.

Meld is a free, open-source, and cross-platform (UNIX/Linux, OSX, Windows) diff/merge tool.

Here’s how to install it on:

• Ubuntu
• Mac
• Windows: “The recommended version of Meld for Windows is the most recent release, available as an MSI from https://meldmerge.org”