Is there any wordpress plugin witch can automatically submit a post to several bookmarking sites at once?

As i know there is not any plugin like it. There only some plugins that make submission to social bookmarking sites easier by inserting their icon to your blog. But an automated script is not available. Maybe you can find this plugin on places which are writing blackhat softwares but if even you find it, i am sure it not free.

Of course, there is. Onlywire is good one.

I do not have any plug in about this but I prefer to bookmark your blog post manually.