Speaking as a freelancer myself, I would be kicking myself if I were in your shoes, but I think its a bit tasteless to go back and ask for royalties now. I'd keep this option in mind for similar systems you plan on building (or if you sell the system to someone else and make it a subscription platform.)
I love matrix - I've been running a Synapse homeserver for over 2 years now for friends and family. We love it. Despite minor problems (upgrading postgres for example) it has been smooth sailing. I really want to stay up to date but they don't make it easy! I'd love to add sliding-sync to my existing docker stack, but I feel like I'm in way over my head!
I like Firefox Sync- this allows sending links to any of my devices. I find it particularly useful when I find a site if interest in my phone and want to look at it on my desktop later. Occasionally I’ll use email or message myself via Element/Matrix.
SO this totally popped into my brain - there was a PHP script you could add to your site called Crisc - https://web.archive.org/web/20021010104130/http://biomatic.o...
It showed your IP and you could send a message to the other visitors on the site - I was blown away at the time I saw this.
OH man I forgot about PogoPlugs -I had about 3 of them around the house before raspberry pi's took over - they were running silly things like dlna and a VERY slow OwnCloud installation - thats really when I got into self hosting.
This. I saw the post and had a mildly customized Jitsi running on my docker host on Hetzner within 2 hours. I'm amazed at the performance and stability of the Jitsi.
I absolutely ADORE Espanso - I use it for stupid stuff, but for note taking and formatting dates I love it.
I just have simple expansions `:gp` does `git pull` `:dcd` does `docker-compose down` and for common tasks, you can do alot!
OH man I love finding new apps like this! Here is my list:
Pihole LOVE it.
Paperless-ngx
minidlna (can't bring myself to use jellyember or whatever)
NextCloud
synapse/matrix - about 10 active users
element-web
archivebox
vaultwarden
duplicati
baikal
home-assistant
navidrome
nginx-proxy-manager
photoprism
syncthing
ttrss
gitea
YES- I recently got a PinePhone and after distro hopping I felt the same way but couldn't put my finger on it. Somethings work in some distros (Mobian vs Manjaro) and it was really frustrating and its not immediately clear why it doesn't work- obviously people are working on it just not together. This is a good priority list that would help herd these cats!