There's vuego: https://github.com/titpetric/vuego
And my own version (I learned of vuego only after): https://htmlc.sh
Not a fan of html/template and tmpl myself, because HTML should be treated as tree and not as strings, but everybody has different preferences.
For routing I now use my own library in all projects: https://github.com/dhamidi/dispatch
It's relatively easy to generate your own nowadays, I mostly go through the Ruby on Rails guides and mix and match the pieces I want for go and turn them into libraries :)