Chika Sensei's Japanese Academy is a site dedicated to helping Japanese learners study for the Japanese Language Proficiency Test (JLPT) at all levels. They offer a range of services, from private classes to grammar explanation videos on YouTube. Now, Chika Sensei has a list of Japanese grammar points into documents differentiated by JLPT level. By submitting your name and email address at her website, you will be sent an email containing links to these grammar lists free of charge.
The lists themselves are high quality, and contain a large amount of grammar structures. In every level, she demonstrates each point with an example sentence. At lower levels (N5-N4), she includes an English equivalent of the grammar structure, as well as an English translation of the example sentence in Japanese. And in the N1 lists, all English goes away and is instead supplemented by multiple example sentences in Japanese. It seems that N1 learners get some tough love here, as they will have to look up each grammar point via other resources if they desire an explanation.
A major plus about these grammar lists is the fact that there is a checkbox for every grammar point. This allows learners to physically check off any grammar structure they think is mastered. Paper-and-pen studiers may particularly enjoy this feature. And arguably the best part about these lists is that they are all free. To create such a nice, useful resource and put it out on the Internet in this way is absolutely amazing.