Sure, you can use any IDE/editor you want. The only downside is that templates are only installed for VS and MonoDevelop (I think you need 7.x for the templates to work), so you’ll need to create your projects from scratch to set it up if you use anything else. For VS Mac there is an extension that can create new projects from the templates.
There are plans for a standalone project creation tool, but there is no timeline for when it might happen.