Wikipedia Gadget will let you place on your Windows desktop a search box that will let you search the Wikipedia.
Wikipedia Gadget supports many languages, besides English: Deutsch, Español, Français, Italiano, Nederlands, 日本語, Polski, Português, Русский, Svenska.
If you are a regular user of Wikipedia you will appreciate this little gadget. (For a powerful alternative, check the SearchALL gadget.)
Save the .gadget file to install later, or run it to start using Wikipedia Gadget immediately