Tymer Portable is a freeware rehearsal timer application for performers, public speakers, or anyone that needs an event timer. Feel free to download it at [Link removed by moderator RM: See below for an explanation. Additionally, do not include the target attribute. It does nothing as it is automatically stripped. No divs either :P].
The program is very simple to use.
I wrote the application to know when to time comedy sets..
To install the portable version, just unzip the file into the PortableApps directory