Running ASP.NET 5 aka vNext on Mono I had to use certmgr to set up environment (trust Nuget certfiicates). This tool was probably good back in the day, but I had a hard time figuring out how what it actually does.
Also there are known bugs which can be taken care of. Given that size of the codebase is small, I think refactoring this tool will be rather quick.
Is community interested in alternative version of certmgr?
The fork can be found on github, in case you want to contribute.
Edit: fixed my midnight writings.