Automatically publish Blogger posts on Twitter and Facebook

There are multiple ways to publish automatically, some of which talk about posting on Twitter using the Feed Burner website, and some of which talk about posting on Facebook using the RSS Gravity application.
Today I will talk to you about two sites that provide the service of publishing blog topics on Twitter, Facebook and other social networks:

TwitterFeed: A wonderful and very useful site in publishing blog topics or site automatically on Twitter and Facebook, the number of users of the site has reached more than 3,300,000 users, create an account for you on the site and then add a link to your blog feeds and then add the places to be published on such as Twitter and Facebook and then you can see the statistics with nutrition links and topics that you have published through the site.
Ping.Fm site: A site that provides an easy and free service to publish your updates on all social networks with the click of a button, the site’s slogan “You can publish from anywhere to anywhere”, registration on the site is very easy, we then add a link to your blog feeds, then add places to be published on such as Twitter, Facebook, Flickr, LinkedIn and many more.