Google's Webmaster Tools is part of Webmaster Central, the overall portion of Google interface with webmasters who wish to utilize Google Services.

 

Webmaster Tools covers Google Sitemaps, of which you can create and submit for varying formats such as Mobile, Video, News, Code Search and GEO.

 

There is a dashboard with a great display of data regarding your sitemap, and you can even have a gadget for the Google Homepage if you want to save time.