Map showing radio sondes carried on weather balloons.

Roughtime is a protocol that aims to achieve rough time synchronisation in a secure way that doesn't depend on any particular time server, and in such a way that, if a time server does misbehave, clients end up with cryptographic proof of it.

“Rough” time synchronisation means that, at this stage, we would be happy with time synchronisation to within 10 seconds of the correct time. If you have serious time synchronisation needs you‘ll want the machinery in NTP or even PTP (which needs hardware support to do right). There’s no reason why Roughtime shouldn‘t be (almost) as precise as NTP, but the use cases that we have in mind for now don’t need much precision. For example, about 25% of certificate errors shown by Chrome appear to be caused by bad local clocks and we don't need much precision to fix that.

Found via Cillian O'Driscoll's fork https://github.com/odrisci/roughtime
See also https://github.com/oreparaz/vroughtime for a simple client written in C.

On-line tool to digitize plot images.

Spresense consists of a Arduino compatible board with Sony’s high performance CXD5602 micro-controller. The CXD5602 has built-in GNSS and high-resolution audio capabilities.

Oil is a new Unix shell. It runs your existing shell scripts, and it's a new language for Python and JavaScript users who avoid shell!
Found on https://swalla24.people.uic.edu/about/

Interesting blog about free software, photography, Gimp, in german.

Bash script using ADB to debloat rooted and non-rooted android devices. Improve your privacy, the security and battery life of your device.
No longer maintained, see https://github.com/0x192/universal-android-debloater for a replacement.

Portable C libraries which provide APIs to build applications with u-blox products and services. Delivered as add-on to existing microcontroller and RTOS SDKs.
Found on https://www.spezial.com/de/node/2052

Capture and communicate acceptance criteria for software and systems, and how they are verified, in a way that’s understood by all project stakeholders, including end-users.

Subplot is a set of tools for specifying, documenting, and implementing automated acceptance tests for systems and software. Subplot tools help produce a human-readable document of acceptance criteria and a program that automatically tests a system against those criteria.

Subplot is currently in its ALPHA stage.

Found on https://en.m.wikipedia.org/wiki/PIC_(markup_language)

Software that aims to provide an easy to use (hopefully) universal blackbox for solving polynomials and secular equations.

Among its features you can find:
- Arbitrary precision approximation.
- Guaranteed inclusion radii for the results.
- Exploiting of polynomial structures: it can take advantage of sparsity as well as coefficients in a particular domain (i.e. integers or rationals).

It can be specialized for specific classes of polynomials. As an example, see the roots of the Mandelbrot polynomial of degree 2.097.151 computed in about 10 days on a dual Xeon server.

If you use MPSolve in your research, please cite it as follows:
Bini, Dario A., Fiorentino, Giuseppe, Design, analysis, and implementation of a multiprecision polynomial rootfinder. Numerical Algorithms 23.2-3 (2000): 127-173.
Bini, Dario A., and Robol, Leonardo. Solving secular and polynomial equations: A multiprecision algorithm. Journal of Computational and Applied Mathematics 272 (2014): 276-292.
Found via https://en.m.wikipedia.org/wiki/Aberth_method and https://en.m.wikipedia.org/wiki/MPSolve
See also the GitHub repository http://github.com/robol/MPSolve.git A simpler implementation of the Ehrich-Aberth-method can be found in https://github.com/robol/ea-roots