If you count on several platforms blockchain post, this can be a very useful tool to consider. It is a web page that you can safely publish at the same time in Steemit, Golos, Whaleshares and Medium, using the same programming code of your post.
It is an initiative of 
They have plans to integrate more but for the moment these can be useful to us.
The first thing we see when we start in is:
There we will be able to see all the tools to publish, very similar to the platforms we already use and with a similar compatibility; the box of the title, The content of the post, the labels and preview. Additionally we have the options of regulating the percentage of the automatic vote when publishing, a signature that we will be able to configure in "Profile" and other options.
We go to "Profile" where we configure the accounts in which we want to publish
We simply place the alias of our account without the @ and the "Posting key" in each tab for each platform.
For the Medium platform, as it is not a blockchain the procedure is as follows (provided by the masdacs page itself)
In the preferences part we can configure the signature that will be placed at the end of the post when we tick this box, the format also allows markdown and html in the same way as the edition of the post and with its preview as well. Remember to save the edited preferences.
We can save a draft of our work for publication later.
We select the platforms where we want to publish, once we have finished writing our post we proceed to press the publish button (PUBLISH).
If we have selected Steemit and any other, it will always be published on Steemit first to prevent the bots on that platform from calling it plagiarism because it was published on another page earlier.
This is the way to cross-publish on these 4 platforms simultaneously.
This same publication was done through this tool.
