[davvid]

[shameless plug] git-cola/git-dag[1] can do this kind of visualization[2], and you can interact with the nodes too (checkout files, diff, etc).

[1] https://github.com/git-cola/git-cola

[2] https://git-cola.github.io/screenshots.html

[teunduynstee]

No, those are looking way nicer. But they just render the git-log output, whereas the chart presented here does a different kind of chart, specifically for git-flow.