What are some open-source software you'd like everyone to know about?

https://reddthat.com/post/18847149

KepassXC for PC and KeepassDX for Android phones.

I personally would recommend it over Bitwarden since with Bitwarden you NEED internet to access your passwords, and even if is open source, i canmot trust it, security breaches can happen in any time, hsving your vault locally stored helps a lot.

There are more but i can’t Remember them right now.

You can self-host Bitwarden, and sync your vault to your phone. Maybe not an option for everyone since it requires some technical skills, but very doable.
Oh you just reminded me, KepassXC and DX Doesn’t demand you to create an account and log in 😄
Self-hosting KeePassXC requires installing one package and backing up one file. I expect that requires less technical skill and is doable for more people than to self-host Bitwarden.