New Linux Kernel hackers can probably best start by grabbing a broom
and helping clean out the source code, together with the nice people
from the Kernel Janitor project.
Looking for easy FreeBSD kernel tasks? Poul Hennink-Kamp is
maintaining a Junior Kernel
Hacker TODO list.
The Hurd doesn't have a TODO list specifically for beginners, but you
can find both of the Hurd's TODO lists near the bottom of their
(Last modified 2003/02/11)