Found via the review
http://www.radioforeveryone.com/2018/09/nooelec-ham-it-up-plus-upconverter.html

gopass is a rewrite of the pass password manager in Go with the aim of making it cross-platform and adding additional features. Our target audience are professional developers and sysadmins (and especially teams of those) who are well versed with a command line interface. One explicit goal for this project is to make it more approachable to non-technical users. We go by the UNIX philosophy and try to do one thing and do it well, providing a stellar user experience and a sane, simple interface.

Flatpak is a next-generation technology for building and distributing desktop applications on Linux.

Collection of programs to run on the PlutoSDR, including the dunp1090 SSR ADS-B receiver, SoapyRemote and OpenWebRX. Can be programmed as image or the programs can be copied onto the PlutoSDR and ran from there.
See also http://www.rfoverride.com/plutoweb/

Note that shaarli could add this link on Chromium 68/Ubuntu 16.04.

Found via computable-reals https://github.com/tarballs-are-good/computable-reals, but others such as Quickproject https://github.com/tarballs-are-good/quickproject are interesting as well.

Matlab implementation of the Durand-Kerner algorithm to compute the roots of a polynomial.

Coccinelle is a program matching and transformation engine which provides the language SmPL (Semantic Patch Language) for specifying desired matches and transformations in C code. Coccinelle was initially targeted towards performing collateral evolutions in Linux. Such evolutions comprise the changes that are needed in client code in response to evolutions in library APIs, and may include modifications such as renaming a function, adding a function argument whose value is somehow context-dependent, and reorganizing a data structure. Beyond collateral evolutions, Coccinelle is successfully used (by us and others) for finding and fixing bugs in systems code.

Various number theoretic algrorithms written in the bc(1) programming language.
See also the calculator program http://www.numbertheory.org/calc/krm_calc.htm from the same author.

NeoPG is a modern replacement for GnuPG 2
NeoPG starts as an opinonated fork of GnuPG 2 to clean up the code and make it easier to develop.
We want to provide a stable and extensible API for application developers, too.
Eventually, we will add new ways to use OpenPGP that make it accessible and usable.