Phoca Gallery category
Phoca Gallery category module shows link to Phoca Gallery categories with thumbnail of first image in category, category name and category description.
Thumbnails can have nicely rounded corners. Check demo.
Shows number of images inside category.
You can dispaly more than one thumbnail from one category.
It's possible to select which categories to show or not. Also subcategories.
New version for J 2.5.XX can show number of hits, number of comments, date of creation and all that can be set from administration.