Every college student has different aim or goal, based on their goals these websites are more important for one to know. 

1. Wikipedia: Open source of information, one can find anything to everything on wiki. 

2. Freelancer: You can make money by doing work related to your skills. 

3. LinkedIn: The professional social media, a person with a strong Linkedin profile is more likely to get a job, it also helps you stay connected with many people of the top class. 

4. Pinterest: One can find all innovations on Pinterest. 

5. Stackoverflow: If you are a programmer, you can search for any kind of error in any language and you can find a solution. 

6. Geeksforgeeks: Want to learn something geeky? 

Then this is the best platform for you to learn new things. 

7. Yourstory: Many of us like to become entrepreneurs, this website helps you in improving your entrepreneurship skills. 

8.Twitter: Got some problem? Tweet mentioning the entity and get the problem solved in minutes, especially in case of E-commerce. 

9. IndiaBIX: It holds all the information about placement drives and upcoming government jobs. 

Last but not least most of us often visit this site Tutorialspoint.

10. Tutorialspoint: Best site to get accurate information related to academics:)