Stream Explorer is a utility that reveals file streams with Windows NT 4.0, 2000, XP, 2003, Vista or Windows 7. Stream Explorer will show you the number of streams in each file as they are listed per folder. When you select a directory entry, Stream Explorer will list all the streams in that entry, and you can see their type, their size and contents. The unnamed stream is shown as <default>.

WHAT ARE STREAMS?
The large majority of files on an NTFS disk will contain only one stream. The data that you normally deal with in the file is kept in that stream. It is called the unnamed stream.
But some files contain multiple streams.
The additional streams are named, like this: "c:\mydir\myfile.txt:mystream".
These streams can contain additional data, such as version information, author information, hard links, etc.

The documentation for the NTFS file system states that NTFS supports multiple streams of data; however, the documentation does not address the syntax for the streams themselves.

The Windows NT Resource Kit documents the stream syntax as follows:
filename:stream
Alternate data streams are strictly a feature of the NTFS file system and may not be supported in future file systems. However, NTFS will be supported in future versions of Windows NT.

Future file systems will support a model based on OLE 2.0 structured storage (IStream and IStorage). By using OLE 2.0, an application can support multiple streams on any file system and all supported operating systems (Windows, Macintosh, Windows NT, and Win32s), not just Windows NT.

The license of this software is Freeware, you can free download and free use this disk management software.