joomvision
JV Facebook 
JV Facebook module allows you to display Facebook Fanbox, Stream, Recommendations, Activity Feed into Joomla 1.5 websites. Note: Don't post your question here because we won't answer it. You should post your question in the support forum. Change log ...
JV Facebook
JV Facebook plugin allows you to add a like button on top/bottom( or both) on each article and share content back to their friends on Facebook. JV Facebook plugin also allows users comment on any piece of content on your Joomla 1.5 website. CHANGE LOG: ...
ZT Google Plus One
Plugin System ZT Google Plus One will be adding the +1 button to your site. +1 is shorthand for "this is pretty cool" or "you should check this out." Let visitors recommend your pages right in Google search results and help your site stand out. Visi ...