Less broadly known than Ruby but the late Itojun[1] and the KAME project[2] also put an inordinate amount of effort into adding IPv6 and IPsec support to the BS

Less broadly known than Ruby but the late Itojun[1] and the KAME project[2] also put an inordinate amount of effort into adding IPv6 and IPsec support to the BSDs. [1] https://www.icann.org/en/blogs/details/rest-in-peace-itojun-ipv6-pioneer-9-11-2007-en https://www.icann.org/en/blogs/details/rest-in-peace-itojun-... [2] https://en.wikipedia.org/wiki/KAME_project https://en.wikipedia.org/wiki/KAME_project