Kiryouku

Kiryouku is a tiny productive tool that blocks distracting sites when you need to focus. Under the hood, it uses a simple HTTP proxy that intercepts requests and blocks blacklisted domains.

I built this after seeing similar features as premium offerings in apps like stayinsession.com. The tool is simple but effective - yes, a VPN could bypass it, but the goal is to add just enough friction to keep you on track.