I'm using Oracle clouds free tier for the 2 free (tiny) VMs.
I use them to host a bunch of misc. scripts/programs I've written, a discord bot I wrote for a server I'm in with some friends, my calibre ebook library is also backed up there and the calibre content server is running so I can access it over the internet should I want something to read and be away from my computer.
Mostly good experience, if not the most user friendly. The data transfer allowance on their free tier is fantastic, which is definitely the exception from most free offerings I've seen.
I'm interested in some feedback on this point too. I'm currently looking at what Oracle has to offer as it seems to be the most straightforward, and also seems to have a simpler pricing structure compared to AWS or Azure for the small addons I may need.
I use lambda to pull some stuff into S3 and DynamoDB (S3 is not free though, and transfer out of AWS is DEFINITELY not free, it's almost always the majority of the cost).
I also use Cloudflare for my static website on S3.
I like free google cloud shell. It's nice to have a place to troubleshoot things from an outside network. Yandex's email is nice for some things also, bring-your-own-domain and 10Gb, no cost.
While I've known of some of the free tier things on AWS, and Google Cloud, I never made use of them long term.