IEFillForm this is easy and comfortable web form filler. It allows to fill a web form and single fields with one mouse click. When it is turned on, it adds its own items in context menu of web page. You need to click with right mouse button within the web form or in the one of its fields and you will see standard context menu of the page with added items of IEFillForm.

The license of this software is Free Trial Software, the price is $15, you can free download and get a free trial.