imp3sh (interactive MP3 shell) is a flexible playlist manipulation shell and song player/streamer. It natively supports MP3 and Ogg Vorbis files/URLs with the Xaudio Asynchronous library for Linux, but can use external players to play any format. It has over 90 builtin commands, and many commonly-used shell features (such as job control, command history, tab completion, aliasing, and more).
Ch is an embeddable C/C++ interpreter for cross-platform scripting, shell programming, 2D/3D plotting, numerical computing, and embedded scripting. It is the simplest solution to numerical computing and visualization in the domain of C/C++. It supports the ISO 1990 C Standard (C90), major features in C99 (complex numbers, variable length arrays or VLAs, type generic functions, long long data type, etc), classes in C++, and extensions to the C language like nested functions, string types, etc. It can be embedded in other applications and hardware and used as a scripting language. C/C++ code is interpreted directly with no compilation to intermediate code. It supports Linux, Windows, MacOS X, Solaris, HP-UX, and FreeBSD.
cfgsh is a configuration shell utility that is intended to be used for configuring embedded systems. It is meant to replace the normal combination of utilities including ifconfig, route, startup scripts, and configuration files with a single program that implements the same functionality in a manner more consistent with the embedded system world.
Apparix allows one to bookmark directories and later jump to them using the mark. By default, it acts as a replacement for cd and can be used in the same manner, including the special behaviour for cd without argument and "cd -". It is possible to directly jump to subdirectories of a bookmarked directory. The contributed bash completion code facilitates completion both on bookmarks and directories, but can be adjusted to accommodate other preferences.