I have been using Wikipedia for about 6-7 year. It is one of the most trusted website from where you can get the information of anything. It helped me to find the most accurate data of my query. It helped me to get the detailed information of any query with accuracy and free of cost.
Wikipedia is a multi lingual content based website which help you to find data in various language. The best thing I like about this is they provide detailed information about your query with hyper link to get other information related to this.