LogSurveil

From DesertHail:

LogSurveil is a simple, web-based log-tailing application. It gives you the benefit of being able to tail selected logfiles from anywhere that has web browser access to the server LogSurveil is installed on; you don't need to install any special client software. You can add as many of your own log configurations as you wish and tail them in real time. You can even tail multiple different log configurations at once by opening up multiple tabs or browser windows of the LogSurveil website, and multiple people can be using the application from different computers at the same time, viewing the same or different log configurations. Log configurations can be entered using local file system paths on the web server where LogSurveil is installed, or you can use UNC paths to enable you to tail logfiles not on the local web server. The only requirement is that the user that the web server runs as has read access to any logfile you enter in a log configuration.