What pieces of FreeBSD are used/imported by other OSes (BSDs)?

[tembun]

I know that all BSD operating systems do share a significant amount of code and some code is regularly imported back and forth. For instance, FreeBSD frequently imports some utilities (mtree(8)) and manual pages from NetBSD. ssh(1) from OpenBSD is effectively used by any modern operating system. pf(4) (that we have in FreeBSD) originally came from OpenBSD as well.

Are there any utilities or say man pages that originally were fully implemented as part of FreeBSD project and now imported and used by other OSes? I did a quick search through {Net,Open}BSD sources and found that they primarily import implementations of C library functions, kernel drivers, and pathes to some existing code from FreeBSD. But I'm curious about specifically user-end utilities or man pages.

Maybe someone knows particular examples of these?

 

[elgrande]

The Windows network stack used to be from FreeBSD afair - no idea though if this is still the case.

 

[mer]

In the timeline from "lawsuit" was FreeBSD first with TCP/IP stack? If so, did that populate Net/Open?

 

[Hiroo Ono]

BSD (Berkeley Software Distribution) was first to implement TCP/IP stack. FreeBSD is its descendant.

 

[Hiroo Ono]

For the userland, libarchive (tar) is a project started from FreeBSD. https://en.wikipedia.org/wiki/Libarchive

 

[unitrunker]

ZFS is a big one - taken from Solaris.

 

[kpedersen]

• Apple's VM solution (xhyve / HyperKit) is based on FreeBSD's Bhyve.
  
  
• Haiku's wifi stack is basically a FreeBSD compatibility layer to use FreeBSD wifi drivers.
  (I believe, many of the popular drivers (i.e iwx, iwm) originated from other BSDs though).
  
  
• QNX uses FreeBSD's wifi drivers too.
  
  
• As for userland programs. bsdutils used to be based on OpenBSD's userland but they migrated to base it on FreeBSD. A few niche Linux distros use this (Such as Chimera Linux).

 

[atax1a]

OS X's userland is largely BSD utils with apple patches.