Disclaimer!

I provide those links since I found those interesting to share. Generally I have no association with the content or the owners of the content.

Server Software

Navidrome - Service for hosting your own music library  Website - Docs - Source
Firefly III - A free and open source personal finance manager  Website - Docs - Source

Client Software

Feishin - A modern self-hosted music player for subsonic and/or Navidrome  Source
SourceGit - Open Source & Free Git GUI Client  Website - Source
Zen Browser - A firefox fork with a modern design and vertical tabs by default  Website - Source
Abacus - An mobile app to use Firefly III on the go  Source

Linux Distributons

Find me a Distro - A website that can recommend a random distro  Website
Distro Chooser - A website that helps you to choose a distro based on choices  Website

Information / Knowledge

Linux Journey - A website for learning about and how to use Linux  Website
Linux Survival - A website to learn the basic linux terminal commands in a easy way.  Website
Consumer Rights Wiki - A website "Exposing the overlooked exploitation of modern customers"  Website
Awesome Privacy - A collection of tools that can help with more online privacy  Website