Email reputation is something people commonly overlook and it's such a big part of running an email server as you don't want to go through all that effort just to land in junk mail.
I like to try different Linux distributions every now and again just to see what new changes are being made. Manjaro Linux and its Architect package caught my eye.
Apple has allowed you run Windows on your MacBook but they make sure that the experience isn't as good as running their Operating System.
Homebrew makes it easy to install and keep installed software up to date on your Mac - as part of my backup routine for my Mac I want to be able to run a single command to reinstall all packages.
Quite a common request is to produce HTML components that resemble Apple design elements.