Not sure if this is the right category, but after coming across a couple of very interesting projects that give people that self-host access to high-quality software that would otherwise have a subscription cost, I figured a list of what non-HA stuff people use in their infrastructure and what they do with them would be nice, especially for those that integrate via addons to HA.
For those that are not yet integrated, this might also be an answer to @frenck 's podcast question as to what addons he should build 
Thus, here’s what I’m running so far:
Bitwarden - Lastpass alternative, with the added benefit of easily sharing selected passwords with your friends & family and built-in 2FA code generator (HASS.IO addon already available)
Blue Iris - NVR software, requires Windows and costs 50$, but is easy to set up and gets you up and running immediately with just about any camera in existence. It can also easily be integrated into HASS.IO
DeConz - To be used alongside a Conbee USB stick, rock-solid, easy to set up and makes Zigbee hardware from all manufacturers available to HA without proprietary hubs (HASS.IO addon already available)
ESPHome - manager for ESP32/8266-type hardware, which I found exceedingly useful for obtaining non-buggy access to BLE devices in the house (HASS.IO addon already available)
Grafana - maker of pretty graphs and dashboards for all sensor data (HASS.IO addon already available)
Grocy - still trying to make the time to really use it properly, seems very handy for managing grocery & battery inventory in one’s house, but likely best used with a physical bar-code scanner and weekly, not daily trips to the grocery store (HASS.IO addon already available)
Hass.io Google Drive Backup - handy for keeping the “HA will be gone in case of flood or fire” anxiety away (HASS.IO addon already available)
InfluxDB - the backbone for Grafana’s data input, also a good solution to keep years of sensor data without the ballooning SQLite default database (HASS.IO addon already available)
Mattermost - Slack alternative, great for chatting behind a corporate firewall and with an API available for bots, thus maybe notification support could be added like with Telegram (Docker container available)
Nginx Proxy Manager - great for managing secure web access to all the other addons without port forwarding. I found it particularly useful for those addons for which Ingress support is apparently impossible (HASS.IO addon already available)
Pi-Hole - ad-free browsing & network analytics (HASS.IO addon already available)
Plex - media manager with some unique perks, like showing you the songs from the TV shows or movies in your collection and cross-referencing actors and directors within all your media (HASS.IO addon already available)
Portainer - Docker container manager with web UI, highly useful for Docker newbies like myself (HASS.IO addon already available)
qBittorrent - torrent client & server with web access
Radarr - torrent/newsgroup movie management
Sonarr - torrent/newsgroup TV show management
Tautulli - Plex usage analytics (HASS.IO addon already available)
Unifi - Ubiquiti network hardware manager (HASS.IO addon already available)
Visual Studio Code - this and the Google Drive backup addon have made the need for SMB in HASS.IO go away (HASS.IO addon already available)
WireGuard - modern VPN solution, used alongside Pi-Hole it can offer your mobile devices ad-free browsing and secure LAN access from anywhere (HASS.IO addon already available)
What I’d like to add going forward:
Snipe-IT - IT asset manager, theoretically meant for corporate inventory management, but that could also prove quite handy for all the hardware that builds up in a typical geek’s home
LazyLibrarian - like Sonarr/Radarr, but for ebooks & audiobooks
Confluence - not free, but a one-time 10$ fee for access to a self-hosted 10-user server is pretty reasonable in my opinion, this could prove interesting as a centralized wiki for things like travel itineraries to which the whole family can contribute
