Hava a look to Unfa’s account on Mastodon.

https://mastodon.social/@unfa

One day I was looking for something to make add records to db and crezte field, etc. Then I’ve found Rukodovitel, it’s very easy to use and powerfull too, juste have look, you can build apps to manage db with this.

https://www.rukovoditel.net/

Yes but he is very active on Mastodon, you can anwser on this thread :

https://framapiaf.org/@davidrevoy/111336038253784524

Thx, I always know this one. But I’m looking for a software, not a website with Pdf