qutebrowser is a keyboard-focused browser with a minimal GUI. It’s based on Python and PyQt5 and free software, licensed under the GPL.

It was inspired by other browsers/addons like dwb and Vimperator/Pentadactyl.

Poplog is a system (compilers, run-time, editor) for the languages Pop-11, Common Lisp, Prolog and ML.
Poplog was developed in the School of Cognitive and Computing Sciences at the University of Sussex and at ISL (now part of SPSS), and is distributed free of charge by courtesy of both organisations.

Matplotlib is a comprehensive library for creating static, animated, and interactive visualizations in Python.

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.