The Last Resort font is a collection of glyphs to represent types of Unicode characters. These glyphs are designed to allow users to recognize that an encoded value is one of the following:

   a specific type of Unicode character
   in the Private Use Area (no private agreement exists)
   unassigned (reserved for future assignment)
   one of the illegal character codes.

These glyphs are used as the backup of "last resort" to any other font; if the font cannot represent any particular Unicode character, the appropriate "missing" glyph from the Last Resort font is used instead. This provides users with the ability to tell what sort of character it is, and gives them a clue as to what type of font they would need to display the characters correctly. (For more information, see The Unicode Standard, Section 5.3 Unknown and Missing Characters.)
Ironically, it is under export control.

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.