In my search for a webinterface/source code platform/whatever for Mercurial,
I stumbled upon sr.ht. It's a really neat
alternative source code hoster and development platform. Some of its features are:
Support for git and mercurial
Completely free software (sourcehut is under the 3-clause BSD license)
Free to use (payment optional)
CI system, free to use, with simple build configuration
Free mailing lists & archives
Free unlisted & private repos
Simple web interface, no JavaScript required
And as such, I've migrated my repos to sr.ht (I know, alpha software, but whatever) and started
writing build files.