Recently I've found the old sources to QConnect and decided to fix it up and release a first public version.
This is an early version and does not contain all planed features. But it already can fully replace the old QConnect and offers a bit more comfort, e.g. it will ask you for a password before joining a password protected server.
Basically it will allow you to click on such links to join a server.
If you start the main application, you will have access to a basic server browser, your personal local server spider, if you want. It also features an auto-update and will tell you once an update is available.
Not sure yet if it's worth to dedicate more time to this/add more/new features. Let's start with this and see how it works out.
Edit: Oh well... Here is the actual download link.