My first post suggested 1 way to do this.

There is another alternative, again, with FontTesterPlus (http://community.coreldraw.com/media/g/claudep/default.aspx).

You can build a "database" of all installed fonts' OpenType features. Here is how :

1) Run the "Tool->Dump installed font info..." command.

2) Depending on how many fonts you have installed, this will take a while and there is no progress bar, not even an hourglass, the app will look and be reported as unresponsive : just wait a few minutes.

3) That will open a dialog that lists all opentype features supported by your fonts.

4) This dialog by itself is useless and too slow.

5) But it also create a file named otfeatures.txt (next to FontTesterPlus.exe).

6) Still useless because there is too much stuff in there.

7) This file however is a csv file which you can import in your favorite spreadsheet. Here I used Excel for this demo.

8) Once imported in Excel, you can turn on the Filter feature which will allow you, as in this example, to list only the fonts that support ss06, for example :

enjoy!