I just found two websites that can be useful if you are looking for grammatical and writing related information.
The discovery happened through a Coursera course and I wrote this post to keep the links at hand and, at the same time, share them with whoever may be interested. BTW, Do you know about Coursera? No? Hold on a second and I will explain.
The first reference website is the Purdue Online Writing Lab which provides many writing resources. The second one, the HyperGrammar section of the University of Otawa website (this one looks like a full English course).
Another interesting place is Common Craft, where you can obtain information about multiple topics in a very simple and ingenious way. They produce minimalist videos to give you a breve, direct and overall introduction to different themes. This site also offers a paid membership but at this point I haven’t read about the benefits.
Coming back to the Coursera topic.
Coursera.org is a website that offers free virtual courses through partnerships with universities and other educational organizations. I really recommend you to take a look to this valuable learning tool.
If you fall deep for free online courses another place to visit is EDX.