Right know, I'm using Ghost as my primary CMS for both my sites. I like its general feel and I don't have to be behind my computer to update it. I miss the ability to create multilingual blogs, though…
Before that, I used various other solutions: Hugo, Kirby CMS or diverse homemade stuffs.
My bookmarks. For when I want to remember that I have a list of articles I'm still not gonna read again. Joke aside, I like to take notes, sometime. And well, it just cool to have the possibility to store and share some links. So, here you go: https://links.lucamailhol.com/bookmarks/shared.
On both my computer and my phone, I read my RSS through NetNewsWire. But, I like the idea of having a “backup” somewhere, at least an interface I can access everywhere. For that, I started to use FreshRSS recently. Why that beyond others? It's compatible with NNW right off the bat.