Open Source C++ Countdown Timers

Simple to use Pomodoro timer with features like sound notification, tray icon and customizable timings. Also available on Arch Linux Install: yay -S simple-pomodoro https://github.com/spikest3r/Pomodoro

A simple countdown timer to put the system to sleep. Similar to the Sleep function on TV sets.

This is a simple timer stopwatch written in C++ with the Qt framework, without any extra features. A program for minimalists.

ShutdownIt is a shutdown tool which can shutdown, restart, logoff, hibernate your pc. It can just remind you or let you start a program. Therefor you can select a countdown timer or a special time stamp.

This library implement RIMS controls for home brewers. For definition of a RIMS, see https://tinyurl.com/j3lyuyc For me, an Arduino micro controller + a LCD Keypad shield was cheaper and a lot more customizable than a commercial PID controller. So, with this library, a commercial PID controller is unnecessary. Automatic PID tuning toolkit is also included. Temperature can be read with a thermistor, a resistance temperature detector (RTD) or any custom temperature probe. Heater is controlled with pulse-width modulation (PWM) of a solid-state relay (SSR). Documentation : https://tinyurl.com/y7579v6a

Pocket Clock ist a program for Pocket PC 2002/2003 on ARM or XScale CPUs. It has 4 functions from which can be choosen in the program. It can be a normal clock and dateviewer, a countdown timer, a countup timer (displays elapsed time), and a target timer

TimeItNow is a little stopwatch-like application with the standard functions you would expect from a stopwatch with a countdown timer. It is a multi platform application working on Linux, Mac OS X and MS Windows.