We have a custom built Joomla 3 plugin that the original developer no longer supports. It's a listing plugin that shows businesses and then categorizes them by business type. You can see the front end here:
Currently the businesses seem to sort by when the entry was created. We need to add some sorting options in the back end so that businesses can be sorted in alphabetical and reverse alphabetical order under 'all' and each category. We just need to be able to change a global sort setting for all categories, it won't change for each category.
We also don't have an install file, but can provide site access, as well as the component files.