This page will contain some useful links to some projects and things I enjoy. I hope you can find something interesting.
This list contains mostly open source/free software projects.
GNU/Linux
The Linux Command Line: A solid book for learning the command line in GNU/Linux distributions. You can download the digital version of the book for free.
Qubes OS: A distribution that aims to provide security through isolation.
Tails: A privacy- and anonymity focused distribution that implements Tor and runs as a live distribution from a USB stick, DVD or similar.
Free Software Projects
The KDE Project: A free software project/community. The community is probably best known for developing the Plasma Desktop and KDE Frameworks.
Nextcloud: A platform for hosting and sharing your data. You can extend the functionality a lot by simply installing apps.
Syncthing: Peer-to-peer file synchronization. A decentralized alternative to proprietary cloud services.
Tor Project: Anonymity online. Defend yourself against tracking and surveillance. Circumvent censorship.
Mastodon: A decentralized social network. A microblogging platform.
Information Security and Hacking
Root Me: Hacking and Information Security learning platform.
Web Security Academy: Free, online web security training from the creators of Burp Suite.
Awesome Hacking: A collection of various awesome lists for hackers, pentesters and security researchers. So a list of list of interesting stuff.
Digital Privacy
Privacy Tools: Provides knowledge and tools to protect your privacy against global mass surveillance. Find privacy and security-aware alternatives to proprietary software.
Signal: A cross-platform end-to-end-encrypted messaging application. Signal can be used for chatting one-to-one, but also to have group conversations, for sending files and have video conversations.
Programming
Real Python: Python tutorials.
ZetCode: Tutorials for programmers.
Edabit: Learn to code with interactive challenges.
System Administration
Awesome Sysadmin: A list of sysadmin resources.
Blogroll
If I want to sit down, relax and read some interesting blogs, then I visit some of the ones below.
Kev Quirk's blog: He writes about things like open source software and web development. He is the guy behind 100 Days To Offload and an admin of the Mastodon instance named Fosstodon.
The New Oil: "Information Security for normal people". A very good blog about information security and privacy.
Open Source Musings: A blog about GNU/Linux and open source software.
Logos by Nick: Various resources for digital artists. Get better using open source software like Inkscape and GIMP.
Marko Saric's blog: A good blog about web development, privacy and tracking.
jlelse's Blog: Jan-Lukas Else's blog about software development and technology news/trends.
Julia Evans' blog: Where do I even start? She has tons of good content to read through. You can find topics such as computer networking, containerization, GNU/Linux, and open source on her blog. You can also check out her "programming zines" (comics for learning about various technical topics).
Miscellaneous
tldr: Simplified man pages.
F-Droid: An Android app and an app repository. Find open source apps for your Android phone.