What certifications and courses online or offline would enhance a computer science engineer’s knowledge, and skills, and will make him or her more valuable as an engineer?

Well, I know about some of the well reputed and must have certifications for computer science engineers depending upon his/her job profile.

1. For software testers: ISTQB certification
2. For Java developers: Sun Microsystem certification
3. For Database developers: Oracle certification
4. For .Net Developers: Microsoft certification
5. For networking engineers: CCNA and CCNP certification