https://github.com/7adietri/ansible-synapse - installs a virtualenv'd synapse from source into /opt/synapse, and maintains a templated config file with a bunch of variables. Last updated Jan 9 2018
https://github.com/atb00ker/ansible-matrix-synapse - installs debian packaged synapse, with nginx + letsencrypt (certbot) Last updated Jan 15 2018
https://github.com/Sifungurux/ansible-matrix-synapse - installs debian packaged synapse with minimal configuration options Last updated Dec 20 2017
https://github.com/binRick/ansible-deploy-synapse - not a playbook; installs via pip into a venv; lots of other stuff too Last updated Sep 1 2017
https://github.com/kultsinuppeli/ansible-matrix-synapse - multiplatform (Debian & RH); templated config (but stale); supports postgres; quite a few variables (documented) Last updated Aug 10 2017