GWebCrawler & Google Sitemap Creator is a free source code web indexing engine running under the MS Windows environment.

This project, is written in VB.NET. Program is currently using only one thread to browse and index the site, but in my tests, adding new threads didn't make big difference or make it any faster.

Program has very high execution and running speed and it is also very small in size and very importantly it's released under the GPL Licence. As of now, this project is not very mature yet, however, it’s an one-man-project and that is why there’re still some bugs and missing features.