Part of the development for CorelDRAW Graphics Suite X6, we did a lot of work around fonts and typography with advanced OpenType features support. We developed a tool internally that helps find out what features are available within a given font. Claude, from the CorelDRAW R&D team posted that FontTesterPlus utility for the members of the CorelDRAW.com community to use.

You can learn more about it in his recent Corel Insider blog post. This utility is provided as-is (see the full disclaimer). Thank you Claude for sharing that very useful utility.