RabbIt is a mutating, caching Web proxy used to speed up surfing over slow links like modems. It does this by removing advertising and background images and scaling down images to low quality JPEGs. RabbIT is written in Java and should be able to run on any platform. It does depend upon an image converter if image scaling is on. The recommended image converter is "convert" from the ImageMagick package.
Websitary is a script that monitors Web pages, RSS feeds, and podcasts and reports what's new. For many tasks, it reuses other programs (such as w3m, diff, and webdiff) to do the actual work. By default, it works on an ASCII basis, i.e. with the output of text-based Web browsers. With the help of some friends, it can also work with HTML.
Web Secretary is Webpage change notification (monitoring) software. It goes beyond the normal functions offered by such software by detecting changes based on content analysis, making sure that it's not just HTML that changed, but actual content. You can tell it what to ignore in the page (hit counters and such), and it can mail you the document with the changes highlighted or load the highlighted page in a browser.
LogiTest is a Java application for functional and regression testing of Web sites. It currently supports GET and POST methods, HTTPS, cookies, browser history, XML formatted tests, simple Testlet API for writing new tests, user-defined HTTP headers and parameters, and regular expressions. Tests are recorded and played back through a easy-to-use GUI and can be stored and loaded from XML files.