What is the difference between NGFB and WPSSO?

The WPSSO Core plugin is a fork (aka child) of NextGEN Facebook (NGFB). They have the same author, many of the same excellent features, but WPSSO Core is distributed without NGFB’s social sharing buttons, and their related features (shortcodes, widgets, stylesheets, javascript caching, and url shortening). As a result, WPSSO Core is 20% smaller and is often preferred for websites that already have (or don’t need) a set of social sharing buttons.

If you wish, you can add social sharing button features to WPSSO Core using the WPSSO SSB add-on (both Free and Pro versions of the WPSSO SSB add-on are available). The combination of WPSSO Core and WPSSO SSB is functionally equivalent to NGFB.

Several add-ons are also available for WPSSO Core: