Usage

settings.py

INSTALLED_APPS = (
    ...
    'changelist_ordering',
)

model.py

from django.db import models

class Example(models.Model):
    title = models.CharField(max_length=100)
    order = models.IntegerField(max_length=3, default=999)

admin.py

from django.contrib import admin
from changelist_ordering.admin import ChangeListOrdering

class ExampleAdmin(ChangeListOrdering):
    ordering = ('order',)

admin.site.register(Example, ExampleAdmin)