Countdown is a project mainly written in C and OBJECTIVE-C, it's free.
Desktop utility app that executes an action when the time runs out.
Countdown is a Mac OS X utility application that allows the user to pick from a set of pre-defined actions to execute when the timer reaches zero.
You can find some screenshots in the Wiki.
Application icon (hourglass.icns) from CocoaDialog, © 2004 Mark A. Stratman.
Created by André Berg on 2010-03-21.
Copyright Berg Media 2010. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.