Is there a Mac OSX equivalent of zenity?

I'm porting some simple X windows/bash scripts to Mac OSX, but I cannot find a build of [Zenity](https://live.gnome.org/Zenity) (a Gnome app for basic GUI dialogs) for OSX. Is there some other command line driven dialog utility I can use? Basic operations: notification dialog - List item - (i.e. basic title, text, icon, OK button) - error notification - yes/no or ok/cancel prompts - select 1 or n items from a list - input text string I don't (yet) know AppleScript (but it seems pretty verbose for the file maintenance tasks I'm interested in).