Still very WIP but serviceable for my own needs. This one is designed to upload elm-package.json files and then track them in localstorage so that I can see which of my several packages has all of their dependencies ported, and are thus eligible for updating to 0.19.
Typical usage is to use the Choose File button to upload an elm-package.json. Dependency packages are linked to their latest documentation (this is especially useful for the now unlisted unported packages) You may also specify the url of an elm-package.json. There is a url parameter designed to allow pointing others at the current compatibility status example
Still needs a lot of style and UX work, and I’d like to provide additional reference links where it is easy to do so.