Adobe Font Folder Alternatives

Are there any other applications that let you drop files into a folder to test rather than installing them directly onto my computer. I’ve been exploring using other applications such as Affinity Designer and even Figma for testing fonts but I haven’t found a way to simply export my fonts into a folder that these apps can access.

https://glyphsapp.com/tools/textpreview

You can also try Nico Hagenberger’s export script, described in this tutorial:
http://www.glyphsapp.com/tutorials/eliminating-font-cache-problems

It does require restarting the apps though in most cases.