ProveIt is a gadget that makes it easy to find, edit, add, and cite references when editing Wikipedia articles. Referencing is a key task at Wikipedia, but the process is often difficult because the citation templates (such as Template:Cite book) are complex. ProveIt simplifies the process by adding a smart and simple graphical user interface when editing any article. You deal with the interface, and ProveIt deals with the wikitext.
You can enable the gadget by going to the Editing section under the gadgets tab in your preferences, or you can try a demo first by clicking .
If you found a bug or would like to request a feature, you can do so in the talk page.