# Python 3.x
import tkinter as tk
import tkinter.font as tkfont

root = tk.Tk()
root.title("All fonts")
scroller = tk.Scrollbar(root)
listbox = tk.Listbox(root,yscrollcommand=scroller.set)
listbox.pack(side=tk.LEFT)
scroller.config(command=listbox.yview)
scroller.pack(side=tk.LEFT,fill=tk.Y)
for font in sorted(tkfont.families()):    
    listbox.insert("end",font)
root.mainloop()