The GUIShell project is a collection of utilities facilitating the use of the GTK+ toolkit in shell scripts through the gtkshell utility. The ACE configuration environment provides sample scripts utilizing gtkshell for desktop utilities. rootcat provides the ability to display messages to the root window using Xft, allowing one to write status display scripts.
log4bash facilitates creating easy to read and easy to parse log files from your bash scripts. Developers have the ability to override pretty much all of the default behavior. If the developer chooses to let a user do so, they can pass flags to a script at run time to control some aspects of the logging output. This includes displaying the logging output to the screen in addition to the log file, and altering the logging level. There is a script included (test.log4bash.sh) that provides working code on how to use all of log4bash's features.