As usual. Place django_apps somewhere in your python path or install it using easy_install:
easy_install django-apps
Then, add django_apps to the INSTALLED_APPS.
In the any template use template tag installed_apps to receive a list
of installed apps along with some information about them.
I use following code in my template, to show apps names along with their versions and descriptions.
{% load apps_tags %}
{% installed_apps as apps %}
<table class="apps">
{% for app in apps %}
<tr>
<td>{{ app.name }}</td>
<td>{{ app.version }}</td>
<td>{{ app.description }}</td>
</tr>
{% endfor %}
</table>
Please, note, that descriptions are hardcoded into the code of the django_apps.