jShare is a simple concrete5 addon that allows you to add a sticky share button on all of your pages (or only a select few).

Currently jShare supports facebook, twitter, digg, delicious, yahoo, email, fav, print, live, stumbleupon, orkut, google, tumblr, linkedin, myspace, evernote, bebo, technorati, reddit, newsvine, mixx, netvibes, and google buzz.