Yes, I remember a site listing the most evil people that ever existed and decided to place Marx at the top. It is not exactly the same thing (as it was not a fact-checking site) but it was similar enough.

Although, is it really that the question? We have known that "both sides" have been bullshitting their way for ages. It's not as if this is a secret.

The only reason that people care about Snopes having a political slant is because 1: it is popular and 2: it pretends that it is not (by being a fact checker). I am not aware of any similar popular and generally considered credible right wing site.

I think you misunderstood the point you were responding to. I don't think they were suggested there are right leaning sites with similar type of bias, I think they were suggesting Snopes may have articles with similar right-friendly bias.