This page is intended to be about German. Both about German grammar and German vocabulary. For now, the grammar is ready, although not all topics are covered in detail yet.
Many of them, however, are already quite decently described. For example, the table of irregular verbs also includes rarer forms such as Konjunktiv II and the 2nd person present tense.
Below is a list of topics that covers all the basics, albeit with varying degrees of accuracy.