[French]

For the weather widget...press and hold it until it lets you drag it and it should hopefully stick. But I have had issues with another clock apparently being just enough too big the widget wouldn't fit.

For the wifi and brightness I actually searched the market and downloaded ones that looked nice to me. I then tested them to make sure they worked to my satisfaction. One of the wifi toggles wouldn't reconnect my router.

The battery app is called battery indicator. There is a light version I think but I'm not sure if it included the widget. There is also a pay version and that's what I have installed. Try the free one first.