Another is https://github.com/mischat/shareNice. They look like they do pretty much the same thing: Serve the icons themselves, and just make them a link to the respective services.

For example:

- https://www.facebook.com/sharer/sharer.php?u=[Url to share]

SocialCount looks like it also cares about how many times a link has been shared, and uses a server-side script to figure that out. That seems like a nice approach if you really want that info, because it doesn't let the social service track the end user.

shareNice seems to have a wider range of services that it supports.