richcocoa [1] filed a request to merge staruml [2] into staruml-2 [3]: Both provide exactly the same packages. staruml-2 seems to be maintained, and regularly updated, at least for now.
[1] https://aur.archlinux.org/account/richcocoa/ [2] https://aur.archlinux.org/pkgbase/staruml/ [3] https://aur.archlinux.org/pkgbase/staruml-2/
