English Exercises .org.
Here you will find thousands of online
created by teachers from all over the world.
If you are learning English language you can use these
exercises to improve your English for free. The exercises
are categorized in different topics and levels.
If you are an English language teacher, you can use our free
tool to make
your own online exercises.
It is very easy. But first you have to register in our main
website: www.eslprintables.com, where we also share
worksheets and powerpoints (it is also free).
Another test I use to prepare my students for the competition. It covers all the grammar poins and can help you see what your students need help with.
Of course, it can be used as a placement test.
I hope you find it useful.