PowerDropping.com
Lists 300 sites with EntreCards above the fold and with fastest load times.
Ty's Blog
Downloadable list of 300 sites with EntreCards above the fold and load times under 2 seconds (and system on how to execute drops fastest).
Oblife.com
Website browser that allows browsing your latest EntreCard droppers or within an EntreCard Category.
Reciprocative EntreCarders Guild at ahkong.net
Self-explanatory...?
Unpredictable Life's EntreCard List
Lists 300 sites whose EntreCard droppers are more serious, as described by EntreCard.