It’s called CCEnhancer. This tool downloads an up-to-date kept list called “winapp2.ini”. In this list there are other applications defined that can be selected in CCleaner’s “Application” tab.
Such as Star Craft 2 logs, Star Trek Online Cache, K-Lite Codec and so many more. It’s too many to list here. As of this moment the ini-file is over 19.000 lines long. So, there’s a lot of software defined.