Discussion on:

Does your website ROT?

... but Webman is really old, no? (2003) Does it still work, or is there an update?

Bottom line - you have to work at keeping your website looking and working good. There are no software solutions for this.

It's amazing how easily the ROT sets in.
I think your spread sheet suggestion, attention to detail and a proper maintenance schedule is the simple answer for anything other than corporate or government websites. Humans are forgetful animals. Most websites need checking for topicality at least once a month because information gets dated or irrelevant.
Then, whenever I have to change anything, I check the complete website against the WC3 validators which are online, free and pick up broken links and errors in syntax.
I then make a new sitemap. I think that's good enough for most sites. The discipline needed to do it is another thing.

Thank you Professor. I have just done this exercise by preparing the content inventory sheet. This will help me a great deal everytime I have to meet my director and brief him about the web site activities of ANDI, http://www.andi-africa.org