www.watchThatPage.com is an online service which provide means to check other websites on changes regulary. The user can be notified of changes by email. The service works for everything which can be retrieved via http.
https and ftp is not possible. In addition, no authentication is possible (except for authentication within the url, but this should not be used anyway). This service is for free; unfortunately, it does only provide basic functionality. This service is good for checking public websites on updates, but is no good for checking tuwel websites or any other website which is personalized through authentification.
To sum up, this service can reduce your time on the net, but it does not work on all websites, so that you have to check some websites manually.
Website Watcher is an application which automatically checks websites on changes. The user ads websites (and also autentication information if necessary) to the program. Afterwards, checks can be done by clicking one button. The program displays all website that have changed since the last check.
Additionally, websites can be checked on a regular basis using the AutoWatch feature. The user can define rules which determine how often a website should be checked.
Unfortunately, the program is not for free. Nontheless, it offers all functionality needed execept checking for flash sites.
There exists no automatic direction button (similar to the one which can be found on top right corner of the KM lecture's homepage) and I handled the problem in this way (I know almost nothing about html, xml and many other IT related topics):
I thought both homepages (Lecture and Exercise) should be organized by the same person or at least in the same way. So I compared URLs of “english homepage” and “german homepage” of the “KM lecture” together. Their difference was just a simple “index.en.html” and I added it to the URL of german homepage of KM exercise.