Found via https://pirsquared.org/blog/, where I followed a link to the sad, but interesting story of the Xfree fork to X.org.
http://asterisk.dynevor.org/xfree-forked.html
I have not read
https://matthew-brett.github.io/curious-git/
yet, but it sounds interesting.

gphoto-sync is an open source command-line tool written in Python. It’s purpose is to backup Google Photos and Albums using the Google Photos Library API. Once setup, it can be run on a regular basis, to ensure all the pictures stored in the cloud are also stored locally on your own storage.

Article describing how to plot with Python, Matplotlib & Pandas.

A new way to program HP calculators like the HP42S, DM42 and Free42.

The Universal Radio Hacker is a software for investigating unknown wireless protocols. Features include
   hardware interfaces for common Software Defined Radios
   easy demodulation of signals
   assigning participants to keep overview of your data
   customizable decodings to crack even sophisticated encodings like CC1101 data whitening
   assign labels to reveal the logic of the protocol
   fuzzing component to find security leaks
   modulation support to inject the data back into the system
Dependencies
Required
   Python 3.4+
   numpy / psutil / zmq
   PyQt5
   C++ Compiler

Optional
   librtlsdr (for native RTL-SDR device backend)
   libhackrf (for native HackRF device backend)
   gnuradio / gnuradio-osmosdr (for GNU Radio device backends)

Found on Filippo Valsorda's blog
https://blog.filippo.io/shrink-your-go-binaries-with-this-one-weird-trick/

Real-time graphing tool written in Python.

Graphite does two things:
   Store numeric time-series data
   Render graphs of this data on demand

Read-only project page.

PyEphem provides scientific-grade astronomical computations for the Python programming language. Given a date and location on the Earth’s surface, it can compute the positions of the Sun and Moon, of the planets and their moons, and of any asteroids, comets, or earth satellites whose orbital elements the user can provide. Additional functions are provided to compute the angular separation between two objects in the sky, to determine the constellation in which an object lies, and to find the times at which an object rises, transits, and sets on a particular day.

The numerical routines that lie behind PyEphem are those from the wonderful XEphem astronomy application, whose author, Elwood Downey, generously gave permission for us to use them as the basis for PyEphem.