NetBSD Ppbus Project  
   A project whose aim is to update the printing subsystem for the NetBSD operating system to use the ppbus system developed on FreeBSD, another open source BSD system.
   http://netbsd-ppbus.sourceforge.net/

NetBSD related stuff  
   Contains links to a NetBSD device driver writing guide, in both english and german.
   http://www.unixag-kl.fh-kl.de/~jkunz/NetBSD/

Some NetBSD resources  
   Anders Dinsen's personal NetBSD page. Contains details on his port of NetBSD to Eicon MIPS based machines, and a NetBSD kernel documentation overview.
   http://dinsen.net/netbsd/

UVM Virtual Memory System  
   The new virtual memory system introduced with NetBSD 1.4. Includes papers on the design, FAQs and transcripts of talks.
   http://www.ccrc.wustl.edu/pub/chuck/tech/uvm/

Verified Executables for NetBSD  
   Paper by Brett Lymn describing his implementation of a "kernel-level tripwire" for NetBSD.
   http://www.users.on.net/~blymn/veriexec/

NetBSD and Handheld Platforms  
   A paper describing the technical challenges in porting NetBSD to a handheld devices, as well as reasons one would wish to install it on one. [EuroBSDCon] [PDF]
   http://2004.eurobsdcon.org/uploads/media/EBSD04_37.pdf

An Implementation of User-level Restartable Atomic Sequences on the NetBSD Operating System  
   Paper by Gregory McGarry detailing part of the groundwork needed for NetBSD's threading system and scheduler activations. [Freenix]
   http://www.usenix.org/events/usenix03/tech/freenix03/full_papers/mcgarry/mcgarry_html/index.html

Scheduler Activations on NetBSD  
   Paper by Nathan Williams regarding the implementation of scheduler activations on NetBSD. [Freenix]
   http://web.mit.edu/nathanw/www/usenix/

The Design and Implementation of the NetBSD rc.d System  
   Paper by Luke Mewburn on the implementation of NetBSD 1.5's new startup system. [Freenix] [PDF]
   http://www.mewburn.net/luke/papers/rc.d.pdf

UBC: An Efficient Unified I/O and Memory Caching Subsystem for NetBSD  
   A paper by Chuck Silvers about the design and implementation of the Unified Buffer Cache (UBC) in NetBSD. [Freenix]
   http://www.usenix.org/publications/library/proceedings/usenix2000/freenix/full_papers/silvers/silvers_html/

Under the Hood  
   A paper by Ignatios Souvatzis entitled "The New Link-Level Independent ARP Subsystem of NetBSD" about kernel internals; how the NetBSD ARP subsystem has been changed to differ from traditional 4.4BSD; and how to change your ethernet driver to co
   http://ezine.daemonnews.org/199809/underhood.html