meld

Supports Git, Mercurial, Bazaar, CVS, and Subversion, allowing seamless use across diverse projects, as listed in the README's key features.

Offers two- and three-way diff for files and directories, simplifying complex merge conflict resolution, highlighted in the Key Features section.

Available on Unix via package managers or Flathub, Windows via MSIs, and macOS via Homebrew or unofficial builds, per the Running section.

Licensed under GPL v2 or later, providing a free alternative to commercial tools, as stated in the About section.