Hi, the Griffith University has a lot of Japanese resources on their website for students. Anyone is able to access the site at: http://www.griffith.edu.au/cgi-bin/fram ... _home.html
Click on the 'Kanji Resources' and/or 'Grammar Resources'. When these pages open up, there is a list down the left-hand-side of the page for drills, resources and information.
You can also test your Japanese level there!
Cheers,
Yamanchu