execline is a very light, non-interactive scripting language, which is similar to a shell. Simple shell scripts can be easily rewritten in the execline language, improving performance and memory usage. execline was designed for use in embedded systems, but works on most Unix flavors.
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.
backupIT is a script to backup local and remote filesystems onto a remote tape drive. It includes a collection of functions to send mail, to use system commands to drive a tape library, and to use NetBackup(tm) to drive a tape library. backupIT uses rsh/ssh to connect to remote hosts, and it supports ufs, vxfs, and ext2 file systems. It works on Solaris, Slackware Linux, and Red Hat Linux systems. backupIT requires the dump utility, which might not be installed on Linux systems.
MSYS (Minimal SYStem) provides POSIX/Bourne configure scripts the ability to execute and create a Makefile used by make on Windows systems. This includes a pseudo-terminal, bash, make, sed, awk, etc. Together with a MinGW installation this environment is comparable to a Cygwin installation, except that it is really open source.