I'm looking for a GUI frontend to the Mercurial version control system. Right now I'm using TortoiseHg, which I dearly love, but it doesn't have any integrated GUI support for the
evolve extension (e.g., folding multiple commits into one). I'm basically looking for something that is exactly like TortoiseHG but has good support for evolve.
I have also used SmartGit, which supports Hg but also doesn't appear to have a GUI for evolve. I have looked briefly at SourceTree but the fact that it now appears to require you to sign in with an Atlassian account is not attractive, and as far as I can see it doesn't have GUI support for evolve anyway.
I'm looking for a solution that is free of charge and ideally open source as well.
Also, hopefully this is obvious from the question, but just to be clear: I'm using Mercurial. I don't want to use Git. Git GUI frontends are not a solution.