Take a look at the Microflow Label widget from the app store. The microflow can build a text string to display from your environment variables or other data, then the widget displays the resulting text.
For things like the server version, take a look at the Community Commons module from the app store
Thanks for your anwser David that helped alot. However values like IP adress of the current user i cannot find. Is this only possible by creating a custom java action?