I self run a number of services for myself.
DNS
DNSSEC-signed zone served by PowerDNS.
Postfix for moving mail around and Dovecot for serving mailboxes.
DANE-enabled thanks to above mentioned DNSSEC.
XMPP
Web
nginx serving a static site.
Code hosting
The hgweb web interface provided by Mercurial.
Monitoring
Prometheus and Grafana