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.
The FReakSHell aims to be a sh-compatible shell and command language interpreter that has some advanced features that can not be found in other shells. It aims towards POSIX compliance by trying to implement the IEEE POSIX Shell and Tools specification (IEEE Working Group 1003.2). Advanced features include advanced job control (i.e. job exchange between different processes, dynamic repiping) and built-in auto-completion.