I am looking for an open source Thermometer that i can connect to a JSON or XML datasource and display this on my website.
The site is an asp.net site so javascript controls are not a problem.
My Googling didn't reveal very much at all.
Any suggestions are welcome.
I don't know of the exact solution. But you can play with jQuery progress bar as mentioned here jQuery sponsorship thermometer and Progress Bars & Controls
You can also look at the area51 site where they implement their progress bar just using div elements in the following way: