Embedded Linux R & D, several open source projects worth studying

I think that as an embedded Linux developer, we should be very familiar with several open-source projects:

1 D-Bus 2 gstreamer3 gconf4 gnome power manager5 mesa6 libxml7 evolution8 gimp9 gnome VFS takes a few months or even a year to analyze, understand, and use the open-source project, I believe that you will be very handy in the development of embedded Linux products. Of course, you should pay attention to connecting with the actual R & D and accelerate the application in the project.