NZBHydra is a meta search for NZB indexers. It provides easy access to a number of raw and newznab based indexers. You can search all your indexers from one place and use it as indexer source for tools like Sonarr or CouchPotato.
I go over how to setup a Calibre-web server on OpenBSD. Calibre-web is a simple Python project and uses a self contained web server even. It perhaps may not be the most secure project around, but why not host all the things on OpenBSD anyway?
SABnzbd is a cross-platform binary newsreader. It makes downloading from Usenet easy by automating the whole thing. You give it an NZB file or an RSS feed, it does the rest. Has a web-browser based UI and an API for 3rd-party apps. Ideal for servers too.
I go over how to setup a Wordpress server on OpenBSD. OpenBSD is very stable and secure so its a great platform for a platform like Wordpress, especially combined with OpenBSD’s httpd as it is a chrooted web server by default.
I go over how to setup a Zabbix monitoring and alerting server on OpenBSD. OpenBSD is very stable and secure so its a great platform for a system like Zabbix. For this configuration we use OpenBSD’s httpd, PHP 7.3, and PostgreSQL, on OpenBSD 6.6.