just starting to realize what the line:
- Added: Adobe Plugins support (8bf) (windows only)
in the list of changes of XnView 1.70 means: All filters/effects available for Adobe Photoshop can be downloaded, integrated in XnView (using Options dialog, category 'Adobe 8BF'), and then called via the menu 'Filter->Adobe compatible plug-in".
And I guess this is why there's a link to Harry's filters on the XnView download page, now.
This is really good!
Note 1: On 'Harry's filters' the freeware plug-ins are listed last.

Note 2: Searching the web for "Photoshop Plug" will give many hits to filters.