Throughout the 15+ years of working with DotNetNuke, we've created and worked on a lot of different Modules, Skins and other Extensions for the DNN platform. If you can't find the module you're looking for here, you might check out Chris' GitHub page.
If you still can't find it, it is very likely that Christoc.com didn't actually create the module you're looking for. One of our open source projects is a suite of templates for development for DNN. Part of those templates is the ability to change the Namespaces, Owner, Owner Email, of the projects when they are created. Many developers create projects using our templates, and never change any of the names, so it looks like Christoc.com created a custom module that you have installed on your DNN site, but in actuality we didn't!
That doesn't mean we can't help you though, if you can't figure out who created the module, we can still help you, we can work with the source code (if available) or potentially decompile the module to create new source code in which we can make enhancements or add new features to.
If you're looking for help on your DotNetNuke modules, be sure to contact us for more info.