Free Gmail Drive

GMail Drive is a Shell Namespace Extension that creates a virtual filesystem around your Google GMail account, allowing you to use GMail as a storage medium.

update: While Google keeps improving their GMail service, they also tend to break the tool's ability to connect to GMail. Version 1.0.5 was released to overcome the latest changes. Please be aware that support for this tool may suspend at any time if Google decides to block its use.