The site pingoat.com is only a blog pinging service that can "ping" your blog to the blog directories, to inform them that you have updated your blog with new fresh contents. It is very easy to use, just put your blog title, blog url, RSS feed(options) and check all the blog directories you want to ping, then press submit button.
No ... pingoat has much more than a blog pining service. There's a link on their site to a nice set of useful online tools including a site map generator. I haven't used it myself but it looks intriguing.
