The British Council has a six-week course at FutureLearn called Understanding IELTS: Techniques for English Language Tests. You can start it right now or when it runs again on 4th February.
According to the British Council, by the end of the course you will:
- be familiar with all parts of the IELTS test
- have some useful tips to help you achieve your IELTS goals
- understand how the IELTS test is assessed
- have an opportunity to have your written and spoken English assessed by other learners [emphasis added]
This doesn’t sound very useful, to be honest. On the other hand, it is free.