halttimer waits for LIRC events or SIGUSR1 and sets a timer which will initiate the shutdown sequence (via "sudo halt" by default) when the time is up. The timer's timeout decreases with each keypress by a specified amount of time. Visualization is done using an on-screen-display (OSD).
Screwdriver++ is a package with various tools for the C++ programmer in Unix environments. It contains classes for time measurement, image and file manipulation, and arbitrary precision arithmetics. Timer is a class for measuring time intervals with millisecond accuracy. Image is a class that uses OpenCv to manipulate images. File is a class to manipilate file input and output in various formats. Number is a class to manipulate arbitrary precision arithmetics.
Gameclock is a fairly simple application designed to track the time spent thinking by the players during a chess game. Various clock engines are available (speed chess, fisher chess, board games, or hourglass). The graphical interface is keyboard-driven and is intended to be minimal and simple. The code is made to be extensible to other game types.
Task Timer Light is a simple, lightweight time tracking utility that allows you to start and stop a timer for each task or project you are working on. It will work on your local computer (with no Web server required) if you don't need saving. You can also install it on your PHP-enabled hosting service, and it will save logged timers so that you can continue them later. It is designed for one person's use.