There's a software package called Zeitgeist that's been finding its way into nearly every Linux and BSD package repository.  It's also on Devuan.  Be sure to read the note at the bottom of this post even if you are not impacted by this.

It reads your emails, it monitors the websites you visit, listens to private conversations, and logs the files on your computer.. and then it shares this information freely over D-Bus to any application that wishes to use it.  You are given no warning and have no option to say which software can access it, and which can't.  Any software can access D-bus, including closed-source software like Discord or Telegram (whether they do or not, who knows).

If this is running on your computer, it will have created a SQLite database in your home directory full of your private information and there will be services running in the background 24/7 collecting data.

Official website: https://zeitgeist.freedesktop.org/
Old website (archive): https://archive.vn/gMDQq

It originated as a GNOME project.. surprise, surprise.  It used to be called GNOME Zeitgeist (https://web.archive.org/web/20090418021015/http://live.gnome.org/GnomeZeitgeist)

From the old website:

Not only that, but there is code in the source to send user data to a remote server over unencrypted HTTP

https://gitlab.freedesktop.org/zeitgeist/zeitgeist/-/blob/main/datahub/telepathy-observer.vala#L33

using Zeitgeist;
using TelepathyGLib;
using Json;

public class TelepathyObserver : DataProvider
{

  private const string actor = "dbus://org.freedesktop.Telepathy.Logger.service";
  private const string tp_account_path = "x-telepathy-account-path:%s";
  private const string tp_identifier = "x-telepathy-identifier:%s";
  private const string ft_json_domain = "http://zeitgeist-project.com/1.0/telepathy/filetransfer";
  private const string call_json_domain = "http://zeitgeist-project.com/1.0/telepathy/call";

  private TelepathyGLib.DBusDaemon dbus = null;
  private TelepathyGLib.AutomaticClientFactory factory = null;
  private TelepathyGLib.SimpleObserver observer = null;
  private HashTable<string, Timer> call_timers = null;

Final note:

GNOME currently ships packages called gnome-tracker and gnome-tracker-miners (may be called tracker-miners or tracker3-miners, etc) that do something similar.  There was another called gnome-online-miners that logged online activity, I think the name is changing and I'm having trouble finding it. 

Gnome Tracker is a hard dependency of GTK4, which means if you have GTK4, you have GNOME Tracker on your system.   Like Zeitgeist, Gnome tracker keeps a SQLite database in your home directory and collects data via background service.  If you check out the database tables, it was developed with the intent of collecting an extraordinary amount of user data.  If you use gnome, you can tame Tracker's data collection a bit using dconf-editor (navigate to org.freedesktop.tracker).

I've lately become intrigued by the Linux Framebuffer as a graphics backend.  There is a strong push to move away from the classic Linux framebuffer and towards more modern technologies, but there's at least one effort to preserve and advance the use of the LFB. 

This is a super interesting project, worthy of some attention.  I thought some of you might be interested.  Here are a few links:

https://higfxback.github.io/
https://directfb2.github.io/ & https://github.com/directfb2/DirectFB2

He's given a couple talks at FOSDEM about his work:

FB: https://archive.fosdem.org/2020/schedule/event/fbdev/
DirectFB: https://archive.fosdem.org/2022/schedule/event/directfb/