Hedgedoc and Nextcloud Notes

yeah, it is available in yunohost catalog https://apps.yunohost.org/app/overleaf and as Docker project.

Gitlab isn't really lightweight. It is cool, but not lightweight.

Plus they always try to hide how stuff works behind the scenes so that day that upgrade script has a bug and fails, it’s hard to revert to a working stage.

Yunohost is creating backups for apps that are being updated. If update fails, it automatically reverts. Yes, it works, I checked.

those projects get eventually abandoned,

Yunohost is here for years now, and it does not look like it will be abondoned any time soon.

I use a Yunohost for more about 1,5 year. I love for stability and simplicity but also openess for more pro users. I have my own backup solution that works great. Yunohost isn't popular but has big catalogue. Some of the apps are not present in catalogue, so I use Docker on second device to get them.

Nextcloud is hard to install in manual way (even sometimes with Docker). As far I know, both Snap and Yunohost versions of Nextcloud are solid. I used Snap version on the cheapest Linode VPS, and it worked fine, especially when I doubled the SWAP to 1 GB. Now I use Yunohost version and I have only good time with it. It is super stable, fast and reliable. I used Nextcloud_ynh on HP 800 Mini G3 with i5-6500t and now on Asrock Mini PC with Ryzen 7 5700g. It is working just great.

If you don't want to use Nextcloud, you ca install Vikunja for kanban and tasks. For notes Hedgedoc can be great.

Adguard Home works really bad on RPi Zero and not as fast as PiHole on Rpi3B+. That's why Adguard is heavier for me.

Maybe HP 800 Mini with i5-6500t? I had this, and now it is available in Poland for around 500 PLN (~112 EUR). Something like: https://allegro.pl/oferta/hp-800-g2-dm-i5-6500t-8gb-ssd-120gb-w10p-mini-13752172316?fromVariant=13752110554 I had the same model but G3 (different chassis) Power consumption was low. With a 1TB USB HDD connected, power consumption was 7-8 watts.

Yes. I have Orange Pi Zero 2 with 1 GB of RAM running Ubuntu. This is actually very powerful machine, more powerful than my Raspberry Pi 3B+. i bought it for about 180 polish zloty (around 40 euros). I use it for printing server with Ghostscript printer app installed via Snap. I also tried Wireguard and MongoDB - everything works fine. it works really well, but it sits around 50 C on CPU, so it can get hot.

It will not be that great like on Raspberry Pi, but Mini PC are also very low on energy. For example,. Wyse 5070 with J5005 idles around 3-5 W, which is really great. i had HP 800 Mini G3 that idled ~7-8W. Mini PCs are more powerful, expandable and can use normal SSD Drive. For selfhosting they are better, but in some places Raspberry Pi (or alternative like Orange Pi) will be better, especially when you need something small and really low power

I don't know when you tried Nextcloud snap. I was using NC Snap on low tier VPS back in 2021 and 2022. For me it was really good experience, and I saw that a lot of people had the same opinion. Unfortunately, snapcraft lacks a lot of apps and even in that small group there are only a few apps that are supported.

Snap apps could be good for a lot of 'just works' stuff, but the app catalogue is tiny. Hardly any of the app catalogue is kept up to date.

Nextcloud Deck is a really good choice and I use it, but I also know Vikunja is great