Guys, check this out. I prepared IELTS for 1 month and used below online material to practice. Got L8.5 R8.8 S7.5 W7. Hope it will help.
http://blog.ieltspractice.com/
https://www.ielts-exam.net/practice_tests/
http://ieltsliz.com/ielts-listening-25-essential-top-tips/
http://takeielts.britishcouncil.org/prepare-your-test/test-day-advice/reading-test-advice
http://takeielts.britishcouncil.org/prepare-your-test/test-day-advice/speaking-test-advice
http://ieltsliz.com/ielts-speaking-part-1-topics/
http://ieltsliz.com/ielts-speaking-part-2-topics/
http://ieltsliz.com/ielts-speaking-part-3-topics-2/
http://blog.ieltspractice.com/
https://www.ielts-exam.net/practice_tests/
http://ieltsliz.com/ielts-listening-25-essential-top-tips/
http://takeielts.britishcouncil.org/prepare-your-test/test-day-advice/reading-test-advice
http://takeielts.britishcouncil.org/prepare-your-test/test-day-advice/speaking-test-advice
http://ieltsliz.com/ielts-speaking-part-1-topics/
http://ieltsliz.com/ielts-speaking-part-2-topics/
http://ieltsliz.com/ielts-speaking-part-3-topics-2/