(to be?) a bunch of stuff of Michael Paoli's
Theoretically to supersede:
http://www.rawbw.com/~mp/

Note: http[s]://[www.]mpaoli.net/ is NOT A HIGH AVAILABILITY site,
not up/accessible?  Maybe just try back later.

Note also, a bunch of stuff here may be links to live stuff,
and (for various reasons) not all of that is necessarily world readable
(public) (e.g. bin contents)

Some selected bits/highlights/notes:
May not necessarily be latest (some are copies rather than links to
current/live).

letsencrypt.org CA infrastructure (for automatically generating keys,
CSRs, requesting certs, validating, and obtaining - including wildcard
certs and same included in SANs with multiple names/domains) ...
well, now that's best seen (including more generally "live"
versions of program(s)/configuration(s)) here:
https://www.balug.org/~mycert/
https://www.balug.org/~mycert/README
https://www.balug.org/~mycert/bin/
etc.