asapm is an AfterStep look & feel Advanced Power Management (APM) monitor for laptop and notebook PCs running Linux or FreeBSD/NetBSD/OpenBSD and X Windows. It displays charge left in the battery, the time left to the total discharge of the battery, computer is connected to the mains or is working on a battery and the battery status high/low/critical.
astime is an analogue clock for X windows. It shows the current time, the date and the day of the week. astime should run anywhere on Unix-like systems in principle but was so far tested on Linux, FreeBSD and Solaris only. The command-line options allow to customize colors of every element of the display.
Replacing xclock with astime
astime can easily serve as a replacement for xclock. The customization of every element of the display window allows to configure it to look exactly like xclock. Or even more. Check out the screenshot at the info page for astime (http://www.tigr.net/afterstep/view.php?applet=astime/data).