BinClock is a program which shows the system time in a binary format. It supports showing the time with seven different colors, and it can run a loop that prints the time every second. The colors can be configured with a config file.
libacpi is a general purpose shared library for
programs gathering ACPI data like battery status,
thermal zones, fan information, and AC status on
Linux.
yacpi is yet another configuration and power interface. It shows acpi
information (battery status, etc.) from your proc filesystem in an
ncurses interface.