OnlyWire

OnlyWire.com allows you to send your content to up to 45 social sharing sites at once. If
you are using WordPress, utilize the OnlyWire plugin so that when you publish a post,
your content will be bookmarked to the 45 social bookmarking sites.

SocialAdr

SocialAdr is a social bookmarking service that allows you to have your bookmark saved
by others in the community if you share the content of others. Users choose the content
that they want to bookmark, bookmark it and SocialAdr automatically also bookmarks it
on multiple bookmarking sites at once.

Use the su.pr Link Shortener

Su.pr is StumbleUpon’s link shortener and when you use Su.pr to shorten a link it will
automatically submit your content to StumbleUpon.