Markdown module recommendations

We’d like to add Markdown support to our open source project, but the problem is that there are multiple alternatives:

All these projects seem to be actively maintained and, at least based on GitHub stars, none is hugely more popular than others. Has anyone here happened to evaluate these and possible other alternatives? Or do you have positive/negative experience from using some of them?

We don’t have that special needs otherwise, but being able to vendor the module would be good. We try to avoid mandatory dependencies to keep installation easy on systems without Internet connection, and I wouldn’t like Markdown documentation support to be an optional feature.