Here's a quick and easy link shortener connected to https://kennethlien/[SHORTLINK]
Go ahead and make an issue with the [SHORTLINK] as the title, and a valid https:// url as the body with nothing else. Then, within a minute, https://kennethlien/[SHORTLINK] should direct to your link.
I reserve the right to close any issues without justification.
The idea behind using the issues API and the 404 page was taken from https://github.com/nelsontky/gh-pages-url-shortener. All credits belong to nelsontky.