This page contains links to sites that I think will be useful for English learners. Please contact me if you would like your site added to this list.
Really Learn English has a lot of free resources, as well as a good store with lots of decent learning material.
Other websites with a good collection of tests for practice are English Grammar Exercises and English Grammar Reference and Exercises.
If you’re taking, or intend to take, the BEC Vantage exam, you really should check out the dedicated area on their website. There you will find details of the exam format, help with preparation and exam dates.
If you’re taking, or intend to take, the BEC Higher exam, you really should check out the dedicated area on their website. There you will find details of the exam format, help with preparation and exam dates.