I'm a long term fan of addthis.com. We've been using their easy to implement sharing buttons for many years. They continue to innovate and add useful features that make any site's content easily sharable, and now provide really useful metrics on how and where content is shared. Here is their view on content sharing in 2011 agregated from a statistically valid 1.2 billion users!

I've been a client since 2000 and have found webbactivemedia to be easy to work and discuss new ideas with. I'm non-computer literate, but he makes me feel comfortable with the web-based world and gives me excellent advice. I'd recommend webbactivemedia to anyone who wants more out of their website.
Steph Williams, Adventure Rope Course.
webbactivemedia was established in 2002, and is a limited company registered in Scotland. Registration Number: SC 232146.
Registered Office:
webbactivemedia Limited. 272 Bath Street, Glasgow, Scotland. G2 4JR.
Correspondence:
webbactivemedia Limited. 16 Rowallan Court, Ayr. KA7 1JR.
Telephone:
0845 68 68 068 or contact us ![]()