The unrelated article https://tonsky.me/blog/syncthing about Syncthing is interesting too. A great quote from https://tonsky.me/blog/phil-libin (not clear whether its from Phil or Nikita):
 The easiest emotional state to generate algorithmically is tribal outrage. It’s a simple and primal emotion. We, as the tech industry, have built a model that we make money when we piss people off. And everyone’s pissed off now, we’ve made a lot of money and people are like, what went wrong? Well, everything went exactly as planned.

BCC is a toolkit for creating efficient kernel tracing and manipulation programs, and includes several useful tools and examples. It makes use of extended BPF (Berkeley Packet Filters), formally known as eBPF, a new feature that was first added to Linux 3.15. Much of what BCC uses requires Linux 4.1 and above.

DECODER stands for DEveloper COmpanion for Documented and annotatEd code Reference. The project participants develop an open source Integrated Development Environment dedicated to improve the efficiency of software development and maintenance and the quality of software in medium criticality systems, such as in IoT, cloud computing and HPC.

Who is peeking over your shoulder while you work, watch videos, learn, explore, and shop on the internet? Enter the address of any website, and Blacklight will scan it and reveal the specific user-tracking technologies on the site—and who’s getting your data. You may be surprised at what you learn.

Need to encode, transmit, or store encrypted or signed data? saltpack is a streamlined, modern solution, designed with simplicity in mind. It is easy to implement & integrate. We've made few crypto decisions and instead leave almost all of the heavy lifting to the NaCl library.

saltpack is a binary message format, encoded using the MessagePack format. Messages are broken up into reasonable (1MB) chunks, over which regular NaCl operations are performed. We have taken pains to address many of the shortcomings of current message formats: (1) only authenticated data is output; (2) repudiable authentication is used wherever possible; (3) chunks cannot be reordered or combined with other transmissions; (4) the public keys of senders and recipients can be hidden; and (5) message truncation is detectable.

Implementations in Go and Python are available at https://saltpack.org/implementations  The format is used by https://keybase.io/

Found on https://ssd.eff.org/en/module/how-delete-your-data-securely-linux

Like nmap for mapping wifi networks you're not connected to. Maps and tracks wifi networks and devices through raw 802.11 monitoring.

Found on https://www.wisdomandwonder.com/programming-language/10783/python3hardwarenetwork-map-and-track-wi-fi-networks-youre-not-connected-to#more-10783

From simple gates to complex sequential circuits, plot timing diagrams, automatic circuit generation, explore standard ICs, and much more

See also https://zee-nix.blogspot.com/2017/05/introducing-gps-share.html and https://github.com/zeenix/gps-share
gps-share is a utility to share your GPS device on local network. It has two goals:

Share your GPS device on the local network so that all machines in your home or office can make use of it.
Enable support for standalone (i-e not part of a cellular modem) GPS devices in Geoclue. Since Geoclue has been able to make use of network NMEA sources since 2015, gps-share works out of the box with Geoclue.

The latter means that it is a replacement for GPSD and Gypsy. While "why not GPSD?" has already been documented, Gypsy has been unmaintained for many years now. I did not feel like reviving a dead project and I really wanted to code in Rust language so I decided to create gps-share.