S4A-Scratch para Arduino https://doc-14-14-docsviewer.googleusercontent.com/viewer/securedow...
Here is Minibloq's manual (online, English): http://blog.minibloq.org/p/documentation.html
And here are additional documents:
Other graphical programming tools for Arduino:
Ardublock (ardublock.cc): free, plugin for the Arduino IDE
Modkit (modk.it): not free by now, except for a limited online version)
There are other graphical envoronments, but these (S4A, Minibloq, Ardublock and Modkit) seems to be the main four.