Qt is a cross-platform C++ application framework. Qt's primary feature is its rich set of widgets that provide standard GUI functionality.

It is an algorithm for the analysis for electromagnetic waveguides. It allows one to map dispersive waveguide data from the frequency-domain to distance-domain, and vice versa.

This is the GNU D compiler, which compiles D on platforms supported by gcc. It uses the gcc backend to generate optimised code.

This is a general purpose allocator with excellent performance characteristics. Initially developed by Daan Leijen for the run-time systems of the Koka and Lean languages.

Mozilla::PublicSuffix provides a single function that returns the public suffix of a domain name by referencing a parsed copy of Mozilla's Public Suffix List. From the official website at https://publicsuffix.org/:

The 1-Wire bus is a cheap low-speed bus for devices like weather sensors, access control, etc. It can be attached to your system via serial, USB, I2C, and other interfaces.