BigClock is a simple desktop clock utility that fills up the entire window with a clock, so you can get a clock of any size. It allows you to choose your own colors and time format. You can launch it through Java Web Start with the link below, or download the jar file directly and run it with the command 'java -jar bigclock.jar' using JRE 1.3 or newer.
I am distributing the program using a technology called Java Web Start which will let you launch it from the web or from your computer, and will take care of keeping your version up to date automatically. If you have never run a Web Start program before, you will need to first install Java Web Start on your computer by visiting http://java.sun.com/products/javawebstart/
Once you've got Java Web Start, you can download and launch the program by clicking the link above. Once you have dowloaded it once, Java Web Start will save the program on your computer, so the next time you launch it (either from this web page or through the Java Web Start application on your computer) it will start up right away. As I release updates, Java Web Start will automatically make sure you have the latest files.
If you've got the Java Runtime Environment 1.3 or newer and Java Web Start installed, you should be all set. Web start works on Windows 95/98/NT/2000/XP. It is installed and configured by default on Mac OS X, so if you're using IE on OS X, you should be able to just click the link above. On Linux, I have gotten it to work with Mozilla, Konqueror, and Netscape 4.76 with no difficulty. When you install Java Web Start, it will update the ~/.mime-types files to include the .jnlp mapping needed for Java Web Start, and Netscape should see this, but I had to go and manually update my Netscape preferences to include the path to the javaws binary and then a '%s'. To do this, go to the Edit menu-->Preferences-->Navigator-->Applications and scroll down until you find the one that says "Java Web Start" in the description column. Then hit Edit and check the box where it says Application, and in the text field next to it, put the path to your web start javaws (eg. /usr/local/java/javaws/javaws) binary followed by ' %s', and that should do it. For Mozilla and Konqueror, and other browsers, you just need to go into the "Helper Applications" type section of the preferences and map the .jnlp extension and/or the application/x-java-jnlp-file mime type to the javaws executable. Please e-mail me with your stories of successes/failures on various platforms and browsers. Note that the classic Macintosh OS does not support Java 2, so only OS X users can expect this to work.