CSS Peeper - Smart CSS viewer tailored for Designers.
Gotty - GoTTY is a simple command line tool that turns your CLI tools into web applications.
Tailwind CSS - A utility-first CSS framework for rapidly building custom user interfaces.
Pagekite - Bring your localhost servers on-line.
Purgecss - Easily remove unused CSS
tmate - Tmate is a instant terminal sharing based on ssh.