学习方面：

1. Coursera(https://www.coursera.org/)
2. edX(https://www.edx.org/)
3. Udemy(https://www.udemy.com/)
4. Khan Academy(https://www.khanacademy.org/)
5. Codecademy(https://www.codecademy.com/)
6. Duolingo(https://www.duolingo.com/)

就业信息方面：

1. LinkedIn(https://www.linkedin.com/)
2. Glassdoor(https://www.glassdoor.com/index.htm)
3. Indeed(https://www.indeed.com/)
4. Monster(https://www.monster.com/)
5. CareerBuilder(https://www.careerbuilder.com/)
6. ZipRecruiter(https://www.ziprecruiter.com/)