wxOptParse is a Python program that brings up a graphical representation of the command line options of a Python program, if it happens to use the standard optparse module. What this means is that if if you have a program that uses optparse you can optionally click on checkboxes, edit boxes, combo boxes, etc. instead of using the command line.
x10ephem computes sunrise and sunset times. It consists of a library and an assortment of utilities. The most useful utility is x10events, which parses crontab files and updates the time fields to track sun events. Combined with an X10 interface like HEYU or X10, this allows the scheduling of lighting events to follow the changing seasons and daylight savings time automatically. This application does not depend on X10; it can be used for any crontab entry you like.