[watwatwat123]

I need to document that better, but rmpk ships with a "ROI optimizer". ROI is an R package that provides bindings to most of the popular solvers: https://roi.r-forge.r-project.org

But I am also working on providing custom bindings to different solvers, to be able to have more control over them. E.g. GLPK: https://github.com/r-opt/GLPKoptimizer

[freemint]

The list of supported solvers is impressive. There are some which I don't know MOI can talk too.

Are there any solvers written in R and not just written in another programming language and wrapped?

[watwatwat123]

I just added a list of the supported solvers to the README. Around 20.

[watwatwat123]

I am not aware of any.