The d command runs a command in the background and redirects its output to a file. The output file is annotated with start and end time, the actual command used, cwd, host, etc. You can ask the d command to extract the last command from the output file and run it again, you can ask it to append to the file or not, and other goodies. It comes with handy little programs to look at the output, tail it, etc. It is sort of trivial, but has been streamlined over many years.
OMake is a build system and scripting language with a similar style and syntax to GNU make but with many additional features, including support for large projects spanning multiple directories, default configuration files simplifying the standard compilation tasks, fast, reliable, automated, scriptable dependency analysis using MD5 digests, built-in support for defining and running autoconfiguration tests, portability, and built-in functions that provide the most common features of programs like grep, sed, and awk. It also provides active filesystem monitoring that restarts builds automatically when source files are modified. A companion command interpreter that can be used interactively is included.
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.
new_script is a program that creates shell script templates. It was developed to facilitate rapid creation of well-formed shell scripts containing the features expected in a production quality script, including traps for signal handling, command line option and argument processing, help messages invoked with the "-h" or "--help" options, and a framework for internal documentation.