The gsubfn function is like gsub but can take a replacement function or certain other objects instead of the replacement string. Matches and back references are input to the replacement function and replaced by the function output. gsubfn can be used to split strings based on content rather than delimiters and for quasi-perl-style string interpolation. The package also has facilities for translating formulas to functions and allowing such formulas in function calls instead of functions. This can be used with R functions such as apply, sapply, lapply, optim, integrate, xyplot, Filter and any other function that expects another function as an input argument or functions like cat or sql calls that may involve strings where substitution is desirable. There is also a facility for returning multiple objects from functions and a version of transform that allows the RHS to refer to LHS used in the same transform.

The SvxLink server provides access to a ham radio transceiver via the EchoLink® protocol. This package contains the AsyncCore library for event-driven applications that use Async classes.

Abseil is an open-source collection of C++ library code designed to augment the C++ standard library. The Abseil library code is collected from Google's C++ codebase and has been extensively tested and used in production. In some cases, Abseil provides pieces missing from the C++ standard; in others, Abseil provides alternatives to the standard for special needs.

QMix is used to simulate the quasiparticle tunneling currents in Superconductor/Insulator/Superconductor (SIS) junctions. In radio astronomy, these junctions are used for heterodyne mixing at millimeter and submillimeter wavelengths. QMix can be used to simulate the behavior of SIS mixers, optimize their performance and analyze experimental data.

This is the GNU C compiler, a fairly portable optimizing compiler for C.

The Point Cloud Library (PCL) is a standalone, large scale, open project for 2D/3D image and point cloud processing.