Scientific computing is one of the areas where Tcl has had a good deal of uptake.
Seismic Unix (SU) is a free seismic reflection and signal processing package available from the Center for Wave Phenomena, Colorado School of Mines, having a command-line-driven interface. TKSU is a graphical user interface to SU, providing the ability to interactively build a processing flow out of SU modules, set values for module parameters from menus, and create a shell script to execute the processing flow. Although developed specifically for the SU package, TKSU is an independent application that can manage any set of programs that follows the command-line convention of the SU package (the "parfile" convention).