That's awesome and exactly what we need. Never any shame in plugging an open source and free project. Would love to see this as a standalone browser plugin some day. Maybe even making it easier to create and share custom lists
Thanks for the feedback!
The site currently allows you to create one personal list that you can sync across all browsers, but I have plans to allow creating several lists and sharing some of them publicly
The main complexity will actually be in the frontend: how to make it easy to edit several instances, and check in what list you'll add a new filter?
For the Stackoverflow / Github clones, we partner with https://github.com/quenhus/uBlock-Origin-dev-filter and their lists are available as presets at the bottom of the filter configuration.