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List of helpful websites:

1.1. Mrunal. Org

1. It's videos Geography, History and Economics are very good. Must watch. Free of cost

2. Mrunal's summary of Current Affairs is really helpful

1.2. Insightonindia

1. It is quite helpful for daily answer writing practice for mains

2. It's current affairs monthly magazine is good

3. You can go through its prelims mock tests and quizzes.

1.3. Vision IAS

1. You can download its monthly current affairs magazine from its website

2. Other helpful videos and helpful materials are there. Free of cost and easy to download

1.4. IAS BABA

1. You can go through its current affairs, magazine, quizzes.

1.5. PIB.gov.in

1. This government website is important to cover key government initiatives

1.6. website of Ministry of External Affairs is good to cover key international and diplomatic initiatives

I will add few more. These are quite important ones.

Prepare well for the exam