I don't know of an alternative, but other folks might.
Sometimes forks get maintained, but it looks like that has not
happened in this case.
https://github.com/boothead/stargate/network/members
As far as listings of add-on on trypyramid.com, there are three statuses:
Pylons Project
Community
Hello list,
I've been trying to use the stargate module, listed here:
https://trypyramid.com/resources-extending-pyramid.html
"""
Stargate
Stargate is a package for adding WebSockets support to Pyramid
applications using the excellent eventlet library for long running
connections.
Maintainers: