Most of the software I use in Crux actually isn't hosted either in the official repos or through the community. Colin Zheng has a fantastic PKGBUILD-to-Pkgfile conversion script that simplifies the task of converting an Arch version into a Crux version.
In general, with that script you can take almost anything you want from Arch and have it compiling in Crux, in a few minutes. The most difficult part after the conversion is finding the package names that correspond for the dependencies.
So in all, anything you want from AUR or the standard Arch menu is also available in Crux. You just have to get your hands dirty.
P.P.S.: Yes, yes, I know. It's CRUX, not Crux. Sorry.