progressbar will open a window containing a text label and a progress bar. The progress bar is updated by reading newline-delimited integers from STDIO. In addition, the text label can be updated by writing a string to input. The purpose of the script is to get an easy way of monitoring progress of computations without having a dedicated terminal window showing printed progress information. Instead a small window with a graphical display of progress is used with the option of adding short strings for diagnostics.