SyncThing. That shit has pretty much replaced iCloud Drive for me, and as such has saved me a fortune.
SyncThing is crazy good. I use it to thing everything to my NAS and from there sync all “common” files between devices
My Calibre library is in a SyncThing folder, so all three of my computers have access to the same library. My phone’s photo folder syncs to it, as well as the working folder for my radio show, so I can work on it wherever I am. It costs me nothing, and requires basically no maintenance.
yt-dlp
I don’t know why I avoided this for so long and stuck to whatever the first search result for ‘online youtube downloader’ was; but it’s been much nicer having a consistent and versatile tool at the ready.
Z-Lib android app
Which one? Could you provide a link?
I don’t think we are allowed to link directly to Z-Library and similar sites, but this wiki from their subreddit provides links. The download for their app is on the website, I believe any of the provided links will work. I think you will have to make an account. I was able to use a proton alias.



