GrapheneOS is a privacy and security focused mobile OS with Android app compatibility developed as a non-profit open source project. It's focused on the research and development of privacy and security technology including substantial improvements to sandboxing, exploit mitigations and the permission model.

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.

Thoughts about the unsustainability of FOSS.

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://www.tuhs.org/pipermail/tuhs/2017-January/009420.html

LibreCores is your gateway to free and open source digital designs and other components that you can use and re-use in your digital designs. Towards this goal, LibreCores provides you a comprehensive and easy directory of digital design components ("IP Cores"),
means to assess the quality of those components, and documentation to learn more about the use and contribution to free and open source digital designs.

SymbiFlow is a fully open source toolchain for the development of FPGAs of multiple vendors. Currently, it targets the Xilinx 7-Series, Lattice iCE40, Lattice ECP5 FPGAs, QuickLogic EOS S3 and is gradually being expanded to provide a comprehensive end-to-end FPGA synthesis flow.

GNU Emacs / N Λ N O is a set of configuration files for GNU Emacs such as to provide a nice and consistent look and feel as shown below. It is based on design principles I described in the article "On the design of text Editors" [1] that is available on arXiv. The light theme is based on Material colors [2] and the dark theme is based on Nord colors [3].

The philosophy of nano emacs is to stick as much as possible to vanilla emacs without introducing too much dependencies (or none if possible) and to keep it modular enough. The idea is for users to copy the part they are interested in such as to include them in their own configuration.

[1] https://arxiv.org/abs/2008.06030
[2] https://material.io/
[3] https://www.nordtheme.com/

Timeshift – free and open source software for creating snapshots of the file system
Also described on the german blog https://hyperblog.de/hoergen/2020/06/28/timeshift-snapshot-tool

Remap any key to any other two keys on Windows. Most commonly used to remap CapsLock to Escape when pressed alone and Ctrl when pressed with other keys. Written in C to run at the lowest Windows API level for speed and reliability.