Interesting web programming stacks using OpenBSD.
https://learnbchs.org
Sample from website below in case it cease to exist in the future.
Show Battery Status on FreeBSD 11
ANother Song
Meld : compare merge
Ubuntu 18.04 LTS have an application that can be use by developer to compare files or folders called MELD.
FreeBSD also have it on its package collection. Just do pkg install meld.
Good night …