I have suggestion. A drop down menu on the top right of every post and reply, that when clicked will give you the options to share - via Facebook, Twitter, google etc.

I did find a perfect example at :
forumscp.com/index.php?topic=64983.20

That's already integrated here mate:

http://www.smfpacks.com/seomod

Per post and per topic

does it come in the sleek drop down format?

There is no effect, but it's indeed a mini-window like that one.

Awesome. I purchased it but had a bit of an install error. I sent it to you through help desk as it wouldn't work with darkly theme

I've replied, those edits aren't required for Darkly as it includes them